There's the Rocky and Bullwinkle where Boris and Natasha have kidnapped our heroes and they're playing in their jazz band, which is a front for whatever evil deed they're up to in that episode. Rocky says to Bulliwinkle at a certain point, "Come on, Bullwinkle, here's our chance to escape!" to which Bullwinkle replies, "Not now, Rocky, I've got an arrangement coming up in the next set." The narrator (William Conrad) references "Four Brothers" at some point in the episode.
If anyone can find this on Youtube, I'd love to see it again.