BRIGADIER LETHBRIDGE-STEWART: You know, just once I’d like to meet an alien menace that wasn’t immune to bullets.

doctor who 1963
Doctor Who (1963–1989) British science fiction television series, original run (BBC)
12×01 “Robot,” Part 4 (1975-01-18) [w. Terrance Dicks]
    (Source)

(Source (Video); dialogue confirmed)