> Homo sapiens! What an inventive, invincible species! It's only been a few million years since they crawled up out of the mud and learned to walk. Puny, defenseless bipeds. They've survived flood, famine and plague. They've survived cosmic wars and...

Once again, the TARDIS shows it has a mind of it's own as the "Doctor" (Tom Baker) finds himself stuck with his new pal "Harry" (Ian Marter) and "Sarah Jane" (Elisabeth Sladen) on a spaceship full of folks in cryogenic stasis. Something isn't right ...