JAMIE: Have you thought up some clever plan, Doctor?

THE DOCTOR: Yes, Jamie, I believe I have.

JAMIE: What are you going to do?

THE DOCTOR: Bung a rock at it.

Doctor Who (1963-1989) British science fiction television series, original run (BBC)

05×02 “The Abominable Snowmen,” Part 4 (1967-10-21) [w. Meryn Haisman, Henry Lincoln]
    (Source)

(Source (Video)). Note that the original video for this episode has been lost; it recreated in animated form in 2022, using audio-only recordings.