This Week in USA
Invasion of the Dinosaurs: Part Four (WWW4)
Last updated 12 May 2026
7:00pm-7:30pm EDT (23:00 GMT) < > « »
Retro TV
Featuring: Jon Pertwee, Nicholas Courtney, Elisabeth Sladen, Richard Franklin, Martin Jarvis, John Levene
While Sarah is held prisoner, the Doctor comes closer to solving the mystery.
Synopsis Source: TVPassport listings
Broadcast Source: Retro TV