City of Death

City of Death is considered by many Doctor Who fans to be the greatest episode of all time. It aired in four parts in 1979 with Tom Baker as the Doctor and Julian Glover[?] as Scaroth, and featured cameos by Eleanor Bron and John Cleese. Filmed mostly in Paris, this episode was written by Douglas Adams. It is full of witty dialog and several Hitchhiker's Guide to the Galaxy references.