The Doctor has obtained a Time and Space Visualizer, which has a TV screen that can show scenes in the past to order. Lincoln, Shakespeare and the Beatles are selected. They land on a barren planet with two suns, and become separated. A sandstorm causes the Doctor and Barbara to lose the TARDIS, Ian and Vicky meet an octopus-like monster, and the Daleks arrive, still hunting for them.—WesternOne
