!! [[Series/BlakesSeven The TV series]]

* ActingForTwo: Jan Chappell plays both Cally and her twin sister Zelda, which makes sense because they're both clones of a single, unnamed parent. She also plays an alien being that bases her appearance on Cally's in "Sarcophagus".
* BadExportForYou: It's currently not available on DVD in the US, though you might be able to scrounge up some VHS tapes.
* DawsonCasting: ''Possibly'' the case with Dayna: though Josette Simon is actually quite a lot younger than other members of the principal cast, she was still in her early twenties when the show was made, but at several points it seems like the character was meant to be in her mid-teens (such as when she refers to herself as a "girl" at one point, explicitly contrasting this with Cally's allusion to herself as a woman moments before). A lot of her other traits (her obvious sexual curiosity around Avon and Tarrant, her quite childlike desire to be comforted when frightened despite her usual {{Badass}} demeanor) could be meant to indicate that the character was intended to be younger than she looked, but might just as easily be put down to her isolated upbringing alone with her father and foster-sister.
* DependingOnTheWriter: After Terry Nation left the show this got so bad for the character of Avon that Paul Darrow gave up and started playing him as [[SanitySlippage slowly losing his mind]] to compensate for it.
* HeyItsThatGuy - [[Series/DoctorWho The Sixth Doctor]] as [[BoisterousBruiser Bayban the Butcher]], and [[Series/DempseyAndMakepeace Harriet Makepeace]] as Soolin, [[Film/BatmanAndRobin Alfred]]/[[Series/DoctorWho Councilor Hedin/The Toymaker]] as Hower, [[Series/{{Callan}} Hunter]] as a Federation officer.
* TheKlutz: Paul Darrow, to a level that has probably not been matched until Creator/MattSmith and a reputation that is legendary (and still growing). He broke every single gun he was handed, and the props department got so frustrated they made him one with an aluminum core so he ''couldn't'' break it... not to mention the sets and various buttons and levers.
** One bts blooper runs like this:
-->Josette Simon in character as Dayna: "Avon, what are you doing?"
-->Darrow, the knob he was fiddling with breaking off in his hand, sending him into an adorkably abashed smile and fit of giggles: "Pulling the set apart."
* RealLife/MeanCharacterNiceActor:
** Jacqueline Pearce. Servalan is an utterly cold, calculating (and scene-stealing) bitch. Pearce herself is a rather charming and good-humored sort.
** Paul Darrow, as well, who (while having wit the speed of Avon's) is charming, self-deprecating, and disarming; a delightful and considerate man to his fans (who consider meeting him or hearing him speak an honor).
* TheOtherDarrin: Travis was played by Stephen Greif in the first season and Brian Croucher in the second. Less visibly, Orac's voice was provided in "Orac" by Derek Farr, who had played his creator Ensor, but in later episodes by Peter Tuddenham. The Federation official Ven Glynd was played in "The Way Back" by Robert James and in "Voice From the Past" by Richard Bebb.
* RealLifeRelative: Paul Darrow's wife was asked to guest star on the show. She agreed on the condition that her character be killed by Avon because she found the idea amusing.
* TalkingToHimself: Peter Tuddenham, in scenes where Orac was talking with Zen or Slave. Tuddenham could reportedly do this with no need for ADR.
* WhatCouldHaveBeen: Terry Nation wanted the invading aliens in the series 2 finale to be the Daleks, and both Gareth Thomas and Tom Baker pushed for a 'Series/BlakesSeven''[=/=]''Series/DoctorWho'' crossover where the Doctor and the crew meet up, but the BBC vetoed both ideas.
** During a writer's strike Paul Darrow wrote an episode script for series D in which the crew desert Avon, marooning him, concentrated on Vila being more heroic than he had been for that series and also be the one who saves Avon by convincing the others to go back for him. Chris Boucher said no.

!! The [[AudioPlay/BlakesSeven audio dramas]]

* HeyItsThatVoice
** ''A Rebellion Reborn'': [[Radio/CabinPressure Martin Crieff]] flies recklessly through asteroid fields, while [[AudioPlay/BigFinishDoctorWho Charley Pollard]] has joined the Federation. [[Series/{{Crusade}} Dureena Nafeel]] is doing smuggling these days, which is just thievery with ambition. And we all know what happens to Blake: [[Series/DoctorWho he's eaten by a werewolf in eighteenth-century Scotland.]]
* RoleReprisal: In ''A Rebellion Reborn'', Michael Keating as Vila and Jan Chappell as Cally or at least ''a'' Cally.
* TheOtherDarrin: The voice of Zen and Orac in the Creator/BigFinish audios is Alistair Lock, replacing Peter Tuddenham who passed away in 2007.