The tenth doctor is on the verge of regeneration. he encountered Anakin Skywalker who has redeemed and entered the Tardis
Doctor 10: I don't wanna go
Anakin Skywalker: Don't worry. Luke Skywalker gave me a second chance to redeem and I am giving you a second chance. You shall be reincarnated as the fourteenth doctor. Please remember I was never here. (Vanishes)
12 years later
The thirteenth Doctor regenerated into fourteenth doctor
