Poppy is a celebration of Victorian values and exposes the hypocrisy, racism, drug dealing, money worship and sexual repression of the time through its favourite entertainment form, pantomime. Dick Whittington, his man Jack, Sally the Principal Girl, the Dame, two pantomime horses, a flying ballet, a transformation scene and even the traditional song-sheet are all brought on to tell the serious and finally devasting story of the single most profitable crop of the British East India Company.

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.