In another galaxy, Barbara and Chinkerton find themselves on a barren planet with a bright purple sky...

... surrounded by weird alien creatures, including a Drahvin called Betty.

They are prisoners of a shadowy, nameless stranger who watches them from afar.

"So, the Doctor is coming to save you..." he murmurs. "In that case, we shall have to take you somewhere even HE won't think of looking..."

Earth. The Space Year 1986 - the South Pole. It's the coldest place on the planet, but it is here that TARDIS appears.

Into the blizzard steps the wily Doctor and his new assistants.

"This must be the coldest place on Earth!" says Dodo Dupont.

"Shush." says Dr Who.

"Brrrrr." says Steven, who didn't think to bring a coat or mittens.

"I don't think Ian and Barbara are here Doctor Who." advises Steven.

In the distance, something stirs...

"That could be Barbara!" Dodo says.

"It's just as hairy." bitches Dr Who.