The Doctor, Martha, and Jack team up to help humanity flee the end of time. Then Derek Jacobi casually drops the greatest plot twist since “I am your father.”
Short Synopsis
The Doctor, Martha, and Captain Jack arrive at the literal end of the universe, where humanity is clinging to survival. Professor Yana is working to launch a rocket to the fabled “Utopia.” Everything looks set for a bittersweet sci-fi sendoff… until a certain fob watch turns up. Cue the revelation: Professor Yana is actually the Master in disguise. He regenerates, steals the TARDIS, and leaves our heroes stranded. Surprise, the finale starts NOW.
Extended Storyline
We open with the Doctor doing something he absolutely did not plan: returning to Cardiff. Why? Because the TARDIS needs a recharge from the local rift in time and space — which, inconveniently, is the same place Captain Jack has been camping out, waiting for his BFF to return his calls. Jack sprints across the base like an Olympic athlete on caffeine, latches onto the TARDIS mid-flight, and promptly causes it to shoot forward to the end of time. Good work, everyone.
At the year 100 trillion (yes, trillion), the universe has mostly given up. Stars are dying, civilizations have crumbled, and the only life left is a handful of desperate humans huddled together in a compound surrounded by cannibalistic mutants called the Futurekind. Because if you’re going to stage a finale, you might as well throw in a Mad Max cosplay contest.
Enter Professor Yana, played by Derek Jacobi, who is running the refugee rocket program. Yana is brilliant, warm, slightly scatterbrained — basically “Gandalf meets Doc Brown.” His loyal assistant is Chantho, who punctuates every sentence with “Chan–” at the beginning and “–tho” at the end, which is either endearing or grating depending on how long you’ve been stuck at the end of the universe.
The Doctor, Martha, and Jack pitch in to help Yana fix the rocket. There’s a lot of techno-babble, some heroic lever-pulling, and the occasional “Martha and Jack passive-aggressively compete for Ten’s attention.” Through it all, Yana struggles with migraines, odd voices in his head, and a mysterious watch that he’s been carrying around but never opened. Fans at home immediately screamed, “We know what that is!” while pretending to be chill.
Things escalate when Martha spots the fob watch and goes full PTSD flashback to the Human Nature two-parter. She realizes — horrified — that Yana has been hiding his true identity the same way the Doctor once did. Meanwhile, the voices in Yana’s head are whispering about drums. Constant drums. Because nothing says “stable scientist” like hearing phantom percussion in your skull.
Then it happens. Yana opens the watch. His entire persona collapses, and suddenly Derek Jacobi transforms from “bumbling kind professor” to “terrifying megalomaniac” in the span of about 0.3 seconds. His voice deepens, his posture shifts, and boom — the Master is back.
Chantho, bless her loyal blue insect heart, tries to stop him. The Master shoots her without hesitation (though she manages to fatally wound him in return). Dying, he stumbles into the TARDIS, locks the Doctor out, and triggers regeneration. Derek Jacobi melts away, and out pops John Simm: smirking, manic, and gleefully ready to cause chaos. The first thing he does? Steal the TARDIS and abandon our heroes in the year 100 trillion with cannibal mutants clawing at the gates.
Talk about an entrance.