Matt Smith on 'SJA' appearance

Matt Smith has revealed that he was "very excited" to be able to appear in an episode of The Sarah Jane Adventures.Smith will play the Doctor alongside Elisabeth Sladen (Sarah Jane) and Katy Manning (Jo Grant) in the Doctor Who spinoff.He told SFX: "I did feel I was in the presence of Doctor Who royalty! Both [Elizabeth and Katy] go back a long way and occasionally I'd be reminded of the show's long and glorious past."He added: "You never lose sight of the fact that you're part of a programme which has been around for a very long time and will doubtless go on for a very long time in the future, long after I've stopped playing the Doctor."

The Sarah Jane Adventures will return to BBC One next month.