She must be a thorough nuisance to you. Come along at once, we shall be hours late.
3 seconds sound clip from the Dead of Night (1945) movie soundboard.
You can hear this line at 00:30:01.164 in the Blu-ray version of the movie.
Quote context
[...]
- It's absolutely thrilling. I'll ring mother and get her OK.
- Tell her Eliot will run you back in the car.
- Mother!
- Really, Sally, this is too bad!
- Oh, good afternoon, Mrs Foley, do please forgive this invasion.
- She must be a thorough nuisance to you. Come along at once, we shall be hours late.
- But Mother, I can't. You see, this is Mr. Craig, and I'm one of the characters in his dream.
- Oh, how do you do? Such fun, charades.
- Still, you do understand, don't you? And poor Edwin's so terribly sensitive. Now, come along, dear.
- Mother, you must listen. You see Mr. Craig is going to hit me savagely.
- Oh, well, I'm sure he can hit somebody else instead.
- Now come along, dear. Don't forget you're dining with us on Tuesday
[...]

 Dead of Night (1945)
 Dead of Night (1945)  Phantom of the Opera (1943)
 Phantom of the Opera (1943)  Scooby-Doo, Where Are You! (1969)
 Scooby-Doo, Where Are You! (1969)  Halloween III: Season of the Witch (1982)
 Halloween III: Season of the Witch (1982)  Knight Rider (1982)
 Knight Rider (1982)