-were you looking for dreamcrabs? well DREAM ON - you'll never see this story because the BBC shitheads deleted it. hope you enjoy lame photo reconstructions. The Mark A’ Terrah is the seventh story of Season 4 of the programme Of The Doctor Who and features the Second Doctor, Ben, Polly and Jamie facing some poisonous-gas-breathing giant crabs called “the Macarena” - awesome! Although audio recordings, still photographs, and clips of the story exist, no complete copies of the episodes themselves are known to have survived. Well shit.