BBC1 premieres the 14th episode of Terry Nation’s science fiction series Blake’s 7, the first episode of the series’ second season. This episode concludes a trilogy spanning the first and second seasons, involving the acquisition of a supercomputer called Orac. Resident voice artist Peter Tuddenham adds the voice of Orac to his duties (he already voices the ship’s computer, Zen). 
BBC1 premieres the 15th episode of Terry Nation’s science fiction series Blake’s 7, the first episode of the series to be written by someone other than Nation himself. Vernon Dobtcheff guest stars.
BBC1 premieres the 16th episode of Terry Nation’s science fiction series Blake’s 7. John Bennett and Scott Fredericks guest star; Brian Croucher takes over the role of Travis (though the obvious difference goes completely unnoticed by the other characters).
BBC1 premieres the 17th episode of Terry Nation’s science fiction series Blake’s 7. William Squire guest stars.
BBC1 premieres the 18th episode of Terry Nation’s science fiction series Blake’s 7. Jane Sherwin guest stars. This episode is the beginning of a story arc running through the remainder of the second season, concerning Blake’s search for the Federation’s central control facility; to up the stakes, the character of Gan (played by David Jackson) is killed off, though the first choice of series creator Terry Nation would have been the popular character of Vila.
BBC1 premieres the 19th episode of Terry Nation’s science fiction series Blake’s 7. John Savident and Peter Miles guest star. This continues a story arc concerning Blake’s search for the Federation’s central control facility.
BBC1 premieres the 20th episode of Terry Nation’s science fiction series Blake’s 7. This is the first Blake’s 7 episode written by renowned Doctor Who writer and script editor Robert Holmes.
BBC1 premieres the 21st episode of Terry Nation’s science fiction series Blake’s 7. Kevin Stoney and John Abineri guest star.
BBC1 premieres the 22nd episode of Terry Nation’s science fiction series Blake’s 7. Tom Chadbon guest stars. This continues the story arc concerning Blake’s search for the Federation’s central control facility.
BBC1 premieres the 23rd episode of Terry Nation’s science fiction series Blake’s 7.
BBC1 premieres the 24th episode of Terry Nation’s science fiction series Blake’s 7. Aubrey Woods, Denis Carey and Nicolette Roeg guest star. This continues the story arc concerning Blake’s search for the Federation’s central control facility.
BBC1 premieres the 25th episode of Terry Nation’s science fiction series Blake’s 7. This continues the story arc concerning Blake’s search for the Federation’s central control facility.
BBC1 premieres the 26th episode of Terry Nation’s science fiction series Blake’s 7. This season-ending episode concludes the story arc concerning Blake’s search for the Federation’s central control facility, and sees the exit of some of the show’s regulars, inclduing Jenna Knyvette (Jenna), Brian Croucher (Travis) and even Gareth Thomas (Blake).