Doctor Who episode 657: The Trial of a Time Lord – Part Twelve (22/11/1986)
‘Whether or not the Doctor has proved himself innocent of meddling is no longer the cardinal issue before this court. He has proved himself guilty of a far greater crime.’ The titles of the Trial segments have been settled since the Target books were published in the late 1980s, but I think it’s telling that this one came out as Terror of the Vervoids rather than the working title The Ultimate Foe. The latter suggests a sort of Golden Age detective story – shades of The Final Problem or The Secret Adversary. The title it’s now known as promotes the generic Doctor Who monster plot above the detective element – which is entirely fitting because that’s exactly what the script does.