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.
| Writing | Christopher H. Bidmead | Writer |
| Directing | Peter Grimwade | Director |
| Writing | Christopher H. Bidmead | Script Editor |
| Production | Barry Letts | Executive Producer |
| Production | John Nathan-Turner | Producer |
| Sound | Paddy Kingsland | Original Music Composer |
| Costume & Make-Up | June Hudson | Costume Design |
| Art | Malcolm Thornton | Production Design |
| Camera | Peter Hall | Camera Operator |
| Editing | Paul Humfress | Editor |
| Sound | Jim McAlister | Sound |
| Costume & Make-Up | Dorka Nieradzik | Makeup Artist |
| Production | Patricia Greenland | Production Assistant |
| Production | Margot Hayhoe | Production Manager |
| Camera | Reg Poulter | Camera Operator |
| Sound | John Holmes | Sound |
| Editing | Rod Waldron | Editor |
| Visual Effects | Dave Chapman | Visual Effects |
| Visual Effects | John Horton | Visual Effects Designer |
| Crew | Dick Mills | Special Sound Effects |
| Lighting | Henry Barber | Lighting Director |
