Doctor Who: Logopolis

After an encounter with the Master, an airline stewardess named Tegan Jovanka becomes an unwitting stowaway aboard the TARDIS as it travels to the planet Logopolis. There, the Doctor discovers that the Master's interference with the Logopolitans' advanced mathematics has unleashed a wave of entropy which threatens to consume the entire universe.

• Christopher H. BidmeadWriter
• Peter GrimwadeDirector
• Paddy KingslandOriginal Music Composer

• Tom BakerThe Doctor
• Matthew WaterhouseAdric
• Sarah SuttonNyssa
• Janet FieldingTegan Jovanka
• Anthony AinleyThe Master
• Delore WhitemanAunt Vanessa
• Tom GeorgesonDetective Inspector
• John FraserThe Monitor
• Christopher HurstSecurity Guard
• Adrian GibbsThe Watcher (uncredited)
• Peter DavisonThe Doctor
• Peter PrattThe Master (archive footage)