Intro: Tonight, The Doctor and his companions travel to Earth, but six years apart. Confusing enough, but nothing compared to the danger of The Brigadier meeting himself, and of "Mawdryn Undead."

Outro: Next week, a deserted liner docks with a massive derelict floating in space. The destination: "Terminus." Travel with us if you dare, next Sunday night at 11. [source: ChicagoEpguides]