The official Doctor Who website has uploaded a brand new video interview with outgoing showrunner Russell T Davies, who talks about the upcoming special, The Waters of Mars, which will debut a week on Sunday at 7:00PM on BBC One and BBC HD!

“It sets up the whole ending of the David Tennant era,” he said. “It’s absolutely terrifying. It’s one of the most scary stories we’ve ever done. If one drop of Martian water touches you, something goes very, very wrong.”

You can watch the whole interview by clicking here.