There were plans for Tom Baker to reunite on-screen with Elisabeth Sladen in The Sarah Jane Adventures.

Baker himself revealed that the Fourth Doctor would have appeared in the spin-off before Sladen’s untimely passing.

He said: “I think it was being mooted at a time when Elisabeth began to be ill. I’d never seen [The Sarah Jane Adventures], you see, but she was so thrilled.

“I had a terrific, tender thing for her. I never met her out of the studio, except by the time she was doing that. But I never got around to doing that. “