Doctor Who: EVERY Fifteenth Doctor Episode Ranked Worst To Best

8. The Giggle

The Giggle has the honour of being the first regeneration story to really spend time with both the outgoing and incoming Doctors. While episodes like Deep Breath featured cameos, this was Ncuti Gatwa in a fully (supporting) role, switching the tone of the somewhat dour Fourteenth Doctor and blasting into an existence of joy with his scantily-clad Fifteenth.

A visual bounty, The Giggle abandons any real attempts at horror (the Toymaker's shop aside) before it plunges into zany action. While, yes, being disassembled and trapped, piece by piece, in bouncing balls is fairly horrific, it was all done to the soundtrack of the Spice Girls. Neil Patrick Harris gives it 110%, barely pausing for air.

But - all eyes were on our new incarnation. There was no moping, no confusion, no fear and alarm - the Fifteenth Doctor was here, had always been here, and Bi-generation logic aside, was accepted in a heart(s)beat. 

Does it make a lick of sense? Well, the jury is still out on that. Was it a fun, upbeat, fantastic moment in the show's history? Without a doubt. Ncuti Gatwa, wearing a shirt, his underwear, and some nice shoes, grinned his way into defeating the Toymaker, dancing with Mel, holding the Doctor, and creating a duplicate TARDIS (forgot about that? Don't worry - so did the show, seemingly!)

If Bigeneration still makes your head hurt, that's ok. You wouldn't be alone. But thanks to Ncuti's infectious grin and Murray Gold's soaring theme for his Doctor, it's very hard not to get swept up in the excitement of it all.