Four kids from Hampshire have written an episode of Doctor Who and got to watch it at a world premiere at their school!
They won a nationwide schools competition to get their script turned into a three-minute mini show starring the Doctor himself, Matt Smith!
The group also got to travel to Cardiff to see the episode called Death is the Only Answer being filmed.
Newsround went to see the world premiere of the new episode, and there were even some surprise guests.
The special one-off episode of the Timelord's adventures will be on Saturday 1 October on BBC Three.