This latest fantasy fare that went out in Autumn on BBC1's Saturday line-up is the work of Merlin’s Julian Murphy and Johnny Capps, and Misfits’ Howard Overman. Much like past BBC shows such as Merlin and Robin Hood the underlying objective is to pay homage to well-known and perennial myths, tales and legends. With a contemporary feel that intends to engage the audience with the onscreen characters , the show is also trying to retain the special, classical nature that the old stories have.

The first aspect which I wish to highlight is the strength of the show's premise. Now in some ways the solid credentials of the production/writing team would make you expect a better sense of direction for a new show than perhaps would be the case otherwise. For myself anyway the core idea of Atlantis is not fully clear or used to its actual potential. The very beginning opens in modern times as Jason (newcomer Jack Donnelly) - in every way a 21st century Englishman - goes looking in the ocean hoping to resolve the mystery of his father's disappearance. Eventually he finds a wreck underwater called 'the Oracle' then wakes up without his modern clothes in the fabled lost city of Atlantis. He quickly acquires the more modest attire of the ancient times and sets about establishing a new home and identity for himself.

There is a lack of clarity over the nature of Jason - is he an explorer from another dimension or really the bona fide Jason of Greek lore? This could have been a clever and exciting character arc but just does not go anywhere meaningful for much of the opening run. Jason is from our time and knows the essentials of Atlantis lore so is in some ways is at an advantage by being so aware of what might/should happen. Yet this is seemingly dropped in favour of a lead who is totally comfortable and familiar with his surroundings by the end of the episode.

In terms of the actual actors and the characters they are given, the show has mixed fortunes. Mark Addy plays Hercules and is back in more familiar territory as the comic relief, after his excellent dramatic performance of King Robert in Game of Thrones. No matter how lacking a storyline may be, Addy can be called upon to liven things up without needing to chew the scenary. Many moments involve Hercules coming out and stealing the scene. For despite being fat, alcoholic and slovenly he seems to be the heart and soul of the show.

Of course apart from Jason and Hercules there is a need for a third character to provide an interesting dynamic. Joining the 'man of action', and the 'past-it rogue' is the 'brains', or Pythagoras - adept at plans and anything remotely complex in mathematics. Played by Robert Emms, this regular cast member is decent enough to watch but rather inoffensive and thus bland when compared to other players. I struggle to remember notable dialogue that he happens to utter, such is the often lacklustre nature of the scripts when it comes to decent characterisation.

Jason is sadly rather weak - the inexperience of the actor being exposed -and relies on better performers around him to make his scenes work. This is especially glaring if the viewer were to compare this show directly with episodes of Merlin - with the excellent Colin Morgan. Even Robin Hood had an agreeable man in Jonas Armstrong. Thus - for the moment anyway -this trio of protagonists are not exactly likely to be the topic that people will be talking about when bringing up their television experiences of the recent weekend.

When looking at characters who appear on a recurring basis, there is more satisfaction to be gained. The Oracle, in a clever link to Jason going down to a wreckage of the same name in the opening sequences, is spookily and mysteriously conveyed by Juliet Stevenson. Even better is the wicked queen Pasiphae. Sarah Parish has done the villainess multiple times before on-screen and is reliably strong. These two actresses certainly know their craft and can add life to even the thinnest of material.

As for others in the royal court, King Minos (Alexander Siddig) has a striking visual presence but lacked a bit too much regal charisma for my liking. He is also somewhat conveniently made to look slow by all the politicking and scheming going on close to him. Ariadne (Aiysha Hart) the immediate heiress to the throne is probably the most average of the cast. She sports an appropriately 'Mediterranean princess' look and has some decent delivery but her scenes never transcend the forced plot developments that take places as one episode follows another. However she seems to get some more expressive reactions out of Jason such is their budding love story. Nonetheless I would prefer that the main lead was bringing a bit more magic to these important one-on-one scene. Donnelly certainly has the looks that would interest a princess, but he seems just a bit passive and unsure of himself.

Elsewhere in the cast, Medusa is very well played by Jemima Rooper as a girl next door with some real courage. In a welcome example of good character interaction, she brings out the best, most meaningful aspects of Hercules. Anticipating her inevitable tragic fate does evoke some bittersweet emotions almost immediately, as the viewer must accept that her capacity for good is to ultimately be subverted for great evil. For those looking for female characters to be proactive and relatively independent, Atlantis builds on the fine examples that Merlin set. Medusa is often needed for help, rescue or just some sage advice.

Another good supporting player that more than looks the part is Oliver Walker as Heptarian. He is just one notch down from the supremely wicked queen in the 'despicable enemy' league, and is a worthy combatant and thorn in the side for the main heroes. Yet even this positive is tainted by the impression that Walker would have probably done a better job than Donnelly as Jason.

In terms of other strengths, there is much soundness in the production values. The show is often lit in bright sunshine such is the warm island setting, or shrouded in atmospheric darkness due to night time or events in unknown caves. Many viewers can pick up on an overall atmosphere that is breezy and mild. The lack of being tied down by historical accuracy means that there is scope for some variety of story and events can proceed differently to what had long been accepted by readers of these myths. Sets and costumes are good, and most of the effects are perfectly acceptable for modern TV and don't take viewer out of the experience.

There are however arguably more weaknesses in this opening run which threaten to drag the show down into unwelcome mediocrity. For one, the potential that exists from the basic variety of stories is not fully harnessed and a lot of formulaic or clichéd stuff happens just a bit too often. Jason seems to have an alarming lack of judgement and sense of how to learn from his errors, although he is not the first protagonist to lack judgement in serial format entertainment. There is a tiresome pattern where he antagonises a guest character which leads to some form of mission, such as retrieving an item, protecting someone or ending the threat of some dangerous beast. The sense of jeopardy coming from the royal court with King Minos being an obstacle for seemingly 'right' reasons, and Pasiphae developing into a very powerful threat is key. However in the vent this supposed tension still plays out at times with a curious lack of oomph.

Although the settings and filming is decent enough there is far too much blurring or overlap, whereby it seems practically every episode has a wander through generic woods or a bit of 'stealth' under cover of darkness. Even more tiresome is the forced humour . While often funny, even Hercules can cause the viewer to cringe at times. One example being his description of a fellow prisoner as 'the man with the three wives [who] knows what I talk about'. This joke is fine for a fundamentally comic storyline, but the context of the actual episode is rather grim. And in the process it adds nothing to a one dimensional supporting character - of which there are plenty in the larger guest cast. This becomes a constant issue with the series - for a light entertainment show there is too much uncertainty just how to blend the less intense moments with the more harrowing ones and that is quite a disappointment given the creative team's past good work.

If things are not forced then they are clichéd half the time. Ariadne often clashes with Pasipahe over her transparently wicked intentions, offering barbed wit. No quarter is given or taken, but the writers certainly did not take long to throw out some tired lines more suited to a catfight in a 1980s 'supersoap'. Any opportunity to hint or provide interesting clues over just what happened with the late wife of the king and birth mother of Ariadne is rather glossed over. Minos clearly is a more modest role than Pasipahe but more could have been done to flesh out his character whether he is onscreen or not. With the lack of information, the audience is forced to fill in blanks relying on conventional step-mother/second wife tropes. There is opportunity though for this to be rectified in later episodes, but would require some care and attention from the writers.

Many BBC TV shows boast music that helps to make the show more effective Atlantis' musical dimension sadly reaches an unremarkable level. Every 'plot development' is seemingly telegraphed and the humour is often surrounded by a dirge of musical 'slapstick'. Mainly contributed by Rob Lane with some work coming from Rohan Stevenson, this is another element which can be improved upon. Perhaps more dynamic scripts would garner better creative input from the music department.

Despite all my issues in general, out of the opening six instalments, only two were real let-downs, i.e. 'A girl By Any Other Name' and 'Twist Of Fate'. The opener was intriguing and well-paced and in my opinion should be mimicked in later episodes for vibrant themes and character momentum. The third and fifth episodes are very enjoyable for the most part, with the sixth being decent enough and bringing some much needed tension as future plot developments look to be rather ominous for the kind-hearted central trio.

In summary Atlantis is arguably a show with just as much, if not more, potential than Merlin, with its options for exotic lands and a variety of human and animal foes, as well as crafty intrigue in the royal court. For now the overall hit-and-miss in terms of story quality is a big hurdle. Even the better episodes can lack depth, as the scripts often trot out average dialogue, and miss out on numerous thematic and 'moral lesson' aspects. The show feels less than the sum of its parts, as bits and bobs of Minoan civilization are pulled together and most episodes are self-contained and could be watched in different order, such is the loose season arc. For any proper momentum to be generated, this show will need more work from almost everyone concerned to match the fine efforts of Mark Addy and a few of those that provide supporting roles.

"Five! Did he say five? Five! That's the whole of my left hand! One, two, three, four, five!"

Vila Restal babbles - Blake's 7: Fractures

Regardless of what your favourite TV programme is - eg, Doctor Who, Arrow, Game of Thrones or The Walking Dead - you know that each new season opens with all barrels blazing from the get-go. It's a time-honoured tactic among TV series that's vital to rebuilding the audience after months off-screen. Once the viewers are hooked, the TV programme can afford to be more experimental with later episodes, slowing down the pace, injecting romance or contemplation, or creating an atmosphere of the claustrophobic or psychological. 2012's Asylum of the Daleks, for example, was Doctor Who's answer to delivering a season-opener with impact; it would have been a risk to have started with The Power of Three.

Even Big Finish is no stranger to this philosophy, as it's shown time and again with many of its mini-trilogies of Doctor Who tales with specific Doctor/companion combinations. So it's surprising that for its first full season of eight full-cast Blake's 7 audio dramas, it has opted for something more like a "mid-season" episode than an adrenaline-fuelled, fist-pumping opener.

Fractures, written by veteran Doctor Who and B7 scribe Justin Richards, marks (in the author's own words) the start of the "extension" to the second season of the Blake's 7 TV series (first broadcast in 1979). Unfortunately, he also seems to have treated this "season within a season" approach too literally. Richards has delivered a story that perhaps could plausibly have been a mid-season episode in B7's second series - but it certainly isn't a story that (to this B7 fan's mind) would have been a worthy one even if it had been produced for the TV series back in the day, and certainly not as a curtain-raiser.

The story starts with an exciting prologue that puts Blake (Gareth Thomas) and the Liberator crew in a stand-off with five Federation pursuit ships commandeered by Space Commander Travis (Brian Croucher). It's the kind of pulsating confrontation that you would expect of a new series-opener and brings back fond memories of early B7 episodes such as Duel that saw a similar confrontation on-screen (albeit with Travis being played by Stephen Greif). In yet another nod to the TV series, the preface even ends with Travis repeating his vow to hunt down Blake to the very end (Croucher recites a speech made more famous by Greif in the character's first episode Seek Locate Destroy).

To escape Travis's grasp, the Liberator retreats to a region of space that is off limits to Federation ships and littered with derelict spacecraft. It is from this point that the proper story begins. The Liberator is suddenly struck by what appears to be a systems crash and members of the crew are inevitably separated and trapped in different sections of the ship. It soon becomes clear that the Liberator has been incapacitated and that one of the crew may be responsible.

In the events that follow, Richards aspires to create a tense psychological mystery. This is achieved through ongoing dialogue between the regular cast members (and no other guest stars) to create suspicion and suspense. Richards has always been adept at making sound an important narrative device in his audio stories (his early Doctor Who serial Whispers of Terror is a great example) and with Fractures he makes the immediacy of the aural experience - with the characters talking to each other across the Liberator's communications channel - critical to the story. Although it becomes patently obvious the longer the story goes on that the Liberator crew are being manipulated, the cast all deliver believable and occasionally intense performances. Furthermore, the actors reprise their roles again as effortlessly as if they've never left them. Thomas is steadfast as Blake, Sally Knyvette cool and calm as Jenna, Jan Chappell inquisitive as Cally, Paul Darrow sardonic and dry as Avon and Michael Keating's Vila as nervously comical as ever.

Unfortunately, the central premise and climax of the story is as clichéd as some of B7's least popular episodes. As a TV series, B7 is most fondly remembered for its epic political and dystopian commentary on the future, not for its occasional and less successful forays into pure or hard science fiction. Fractures unfortunately belongs to the latter, although it would be grossly unfair to say it is as diabolical as The Web, Trial, Sarcophagus or Ultraworld - TV episodes that were endlessly derided by fans for being poorly written and unsuccessfully realised on screen. Nevertheless, the threat in this serial proves to be very generic and rather unimaginative and could belong just as easily in a Doctor Who serial or a Star Trek episode as a B7 one.

The serial ends with the Liberator crew learning information that has ramifications for the next seven instalments of this audio series. To me, this reinforces why Fractures is a weak and disappointing start to what may otherwise be an enthralling and tense saga. Perhaps this episode should have appeared in the middle of this run - certainly, if it had been part of B7's original television run, it would have been a mid-season episode and a forgettable one at that, with little relevance to the overall story arc. Let's hope the next instalment - the dramatic-sounding Battleground – is a major improvement.