Original air dates 26 February – 2 April 1977. A big six-parter for the season finale of Season 14!
A ventriliquist finishes his performance, and is accosted backstge by a man with a missing wife. He denies any knowledge.
Doctor and a badly dressed Leela arrive in Victorian London to see Weng-Chaing.
One of the porters comes into the stage fearing he’s seen s ghost. The stage manager shuts him up.
Doctor and Leela are attacked by four Chinese men, who are run off by the bobbies who take Doctor and Leela to the station. Weng-Chaing from the theatre is brought in to question the man, kills him. Doctor sees, nobody else listens.
Doctor and Leela chased by chinamen, head into the sewers. Oh goody, giant rats. Credits roll.
Theatre manager gets whammied by Weng-Chaing to forget the person who came in looking for his wife.
Chaing goes to a hidden lab under the theatre. Meets masked man who wants another girl as the disease is getting worse. They go to get another victim.
Sneaking about. Weng-Chaing and his Master find the Time Cabinet, while the Professor and Leela dine. Leela less graciously than some. Doctor investigates the theatre. Finds the “Master” and chases him into the loft. There is a fight in the suspended sets. The “Master” is pretty spry for a dying man.
Leela waits as the Professor checks for an intruder. She’s attacked by the ventriliquist doll who’s weilding a knife and looking dangerous. Credits roll.
Weng-Chaing lurks in the shrubbery with the Professor’s gun, and there are gunshots. Chaing flees in a wagon, Leela jumping on the back to follow. Doctor talks to Professor, finds Time Cabinet a “puzzle box” that won’t open.
Leela follows Chaing as he collects girls for the Master’s hunger. Doctor prepares to hunt the theatre himself. Leela swaps herself for one of the girls. The Master distills the first girl. Leela interrupts, gives chase. They chase each other. Leela escapes to the sewers, where the rats are.
Master fires Chaing, sends him away.
Doctor and Leela both in sewers, rats chasing. Credits roll.
Doctor shoots giant rat, freeing Leela. They flee to the Professor’s, who helps outfit Leela with proper clothes.
Leela and Doctor head back to the theatre. Everything comes to a head on stage and the Doctor figures it out too late as the Master and the midgets escape with the time cabinet. Credits roll.
More chasing, following a lead, find Chaing. Chaing is dying. Doctor chasing a bag of equipment. Professor and theatre manager are brought to the Master.
Master improsons Professor and manager, who make their own exit via a dumbwaiter, only to be caught. the “Master” winds up at Professor’s house to get the key. Doctor and Leela wait there; Leela is grabbed, and breaks the Master’s mask off, revealing a melting face. Credits roll.
Big fight at the Temple of the Dragon, where everybody turns on everybody else. In the end, the bad guy dies his terrible death, the pig-based evil computer minion is disarmed, and everyone escapes. Only Leela remains confused about tea.