A hilarious sketch starring David Tennant and Sir Lenny Henry was shared on March 17 as part of Comic Relief’s Red Nose Day special on BBC One.

Sir Lenny Henry claimed to feel sick while introducing the annual show, declaring “What I need is a doctor!”

Right on cue, he “regenerated” into David Tennant dressed as the Fourteenth Doctor while the Thirteenth Doctor’s theme played during the amusing sketch.

“I know these teeth. What? What? What? I’m going to be hosting Comic Relief? What? Ahh!” puzzled Tennant, checking his watch as he rushed off to host Red Nose Day while the Doctor Who theme played.

Later in the broadcast, a Dalek auditioned for Eurovision.

You can donate to Comic Relief by visiting their website or calling 03457 910 910. To donate five, 10, 20, 30, or 40 pounds, simply text the word FIVE, TEN, TWENTY, THIRTY or FORTY to 70702.