You can make out modern electrical outlets on the walls of Litefoot's lab, despite the stagehands' attempts to cover them with tape.
Chang: In my country, we have saying. "Man who go too quickly may step in bear trap."
Leela: This is a big village?
The Doctor: Yes.
Leela: What's the name of the tribe here?
The Doctor: Cockneys.
The Doctor: We were attacked by this little man and four other little men.
Sergeant Kyle: When I got here, sir, he was being strangled with his own pigtails, sir.
The Doctor: Really? Girlish enthusiasm, officer?
Sergeant Kyle: You might call it that, sir. I call it making an affray.
Casey: Are we going to look down the cellar, Mr. Jago?
Jago: Of course, Casey, of course! When I promise to do something, determination, character… After you.
The Doctor: What's this?
Leela: A janis thorn.
The Doctor: Yes, I thought I told you not to carry…
Leela: He was trying to kill you!
The Doctor: Oh. Oh, well in that case, you'd better come along.
Jago: Courteous coves, these Chinese. I'd have propelled him onto the pavement with a punt up the posterior.
Sgt. Kyle: You do have a permanent address, don't you?
The Doctor: No, sergeant, we're travellers.
Sgt. Kyle: I see, persons of no fixed abode.
The Doctor: No no no, we do have an abode. It's called a TARDIS.
Sgt. Kyle: A… TARDIS.
The Doctor: But it's not fixed.
Jago: You've been drinking!
Casey: Not a drop, sir!
Jago: Then it's time you started!
Leela: Doctor, you make me wear strange clothes, you tell me nothing: you are trying to annoy me.
DVD: Doctor Who: The Talons of Weng-Chiang (BBCDVD 1152) released in April 2003. Released in U.S.A./Canada (Warner Home Video E1814) in October 2003.
Video: Doctor Who: The Talons of Weng-Chiang (BBCV 4187) released in omnibus format in November 1988. Released in U.S.A./Canada (Warner Home Video E1153) in November 1988.
Novelisation: Doctor Who and the Talons of Weng-Chiang by Terrance Dicks (ISBN 0 426 11973 8) first published by W H Allen in 1977.
This episode's working titles were "The Talons of Greel" and "The Foe from the Future".
The conductor of the theatre orchestra in the opening shot is Dudley Simpson, the composer of much of Doctor Who's incidental music.
There are several Sherlock Holmes in-jokes/references scattered throughout the episode. Litefoot has a housekeeper named Hudson, just as Holmes did. The Doctor wears what is often considered Holmes' standard clothing of a deerstalker and cloak (although Sir Arthur Conan Doyle himself never described Holmes as wearing such clothing). The mutated giant rats are a reference to one of Holmes' "undocumented cases" dealing with Giant Sumatran Rats.
Based on an idea by Robert Banks Stewart, The Foe from the Future, for which Stewart received no credit after Holmes worked it up into a full-length story.