Here's a curio from the days when prime-time network TV shows had individual sponsors. One company would be the sponsor of a series. They might swap out a few commercials with other firms — usually ones that shared the same ad agency — but Chevrolet, for instance, sponsored Bonanza and other programs.
In September of '64, an episode of Bonanza ran without commercial interruption so that they'd have time at the end for this promotional film. Lorne Greene and others on that show stepped out of their characters to help unveil the 1965 lineup of Chevy models…and they even got help from other actors on other concurrent shows sponsored by Chevrolet. Take a gander…
