Who On Who? marks the end of an era in the history of Doctor Who. In this programme Russell T Davies reveals to David Tennant whether he will ever write for the show in the future and his feelings about his successor on the series, Steven Moffat.

Scheduled for broadcast on BBC Radio 2 on December 29th (my birthday…), RTD also reveals the influences behind Doctor Who and why the success of the revamped series took the cast and creative team behind it by surprise.

Most interestingly, David Tennant asks about Russell’s plans for the future and both men discuss why it’s the right time for them to both leave Doctor and reveal that they made the decision to leave at roughly the same time.

“It just made sense and it’s continued to make sense with hindsight,” says Russell T Davies. “There’s not been one moment where I’ve thought we’ve done the wrong thing.”

David Tennant agrees: “It feels like we’ve had the right amount of time to tell a great story.”

Tune in to BBC Radio 2 on Tuesday, December 29th at 5pm to catch this fascinating look at the las 5 years of Doctor Who!