Doctor Who Once More Redefines What It Means When The Doctor Regenerates

Warning: Spoilers ahead for Doctor Who season 15, episode 5, "The Story and the Engine."Doctor Who season 15, episode 5, "The Story and the Engine," includes a new description from Ncuti Gatwa's iteration of the Time Lord that revisits what regeneration feels like. The transformative process that has allowed every Doctor actor to appear in the show is something that has been altered a few times in recent years. Most recently, 2023's "The Giggle" introduced Gatwa's Fifteenth Doctor via a previously unseen version of regeneration called bi-generation, which allowed David Tennant's Fourteenth Doctor to remain as a fully autonomous being. This change made it one of the coolest Doctor Who regeneration sequences.