Doctor Who Secret Revealed After 39 Years

A new DVD release has finally named the actress originally cast as Sarah Jane Smith

Lis Sladen knew, but refused to say, believing it was unfair to the actress concerned, but now the cat’s been let out of the bag. The truth’s emerged in, of all places, the text commentary track on the DVD of “Invasion Of The Dinosaurs”, part of the new UNIT Files box set .

Deputy Editor, SFX

Ian Berriman has been working for SFX – the world's leading sci-fi, fantasy and horror magazine – since March 2002. He's also a regular writer for Electronic Sound. Other publications he's contributed to include Total Film, When Saturday Comes, Retro Pop, Horrorville, and What DVD. A life-long Doctor Who fan, he's also a supporter of Hull City, and live-tweets along to BBC Four's Top Of The Pops repeats from his @TOTPFacts account.