Episode one wasn't shown owing to it being in black and white.

Intro: The Doctor and Sarah return to London to find it under martial law, and deserted. The cause soon becomes apparent. And the title of tonight's adventure gives the game away: "Invasion of the Dinosaurs."

Outro: Next week, a space plague strikes all creatures in the galaxy and The Doctor is confronted by an old nemesis. Be with us next Sunday evening at 11 and join the cry "Death to the Daleks." [source: ChicagoEpguides]