THE DOCTOR: But you can’t rule the world in hiding. You’ve got to come out on the balcony sometimes and wave a tentacle, if you’ll pardon the expression.

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

13×01 “Terror of the Zygons,” Part 4 (1975-09-20) [Robert Banks Stewart]

(Source (Video); dialog verified)

Variants:

• "Well, you can't rule the world in hiding. You've got to come out onto the balcony sometimes and wave a tentacle, if you'll pardon the expression."
• "Well, you can't rule the world in hiding. You've got to come out, onto the balcony sometimes -- and wave a tentacle."
• "You can't rule the world in hiding. You've got to come out on the balcony sometimes and wave a tentacle."