Blake's 7 (1978)

S4E13 Blake

Following Orac's lead to Gauda Prime, Avon and his team leave the ruined Xenon base behind. As they approach the planet, Scorpio comes under attack, resulting in a crash landing on Gauda Prime's surface. Determined to find Blake, Avon and his crew embark on a search, only to uncover troubling evidence suggesting that Blake may have betrayed their cause and aligned himself with the Federation.