WKRP in Cincinnati: "Turkeys Away" (Season 1, Episode 7, aired 10/30/1978)
Mr. Carlson is beginning to feel useless at the new formatted rock station so he decides to create a big Thanksgiving Day promotion. His idea? Get a helicopter, with a banner attached to it saying "Happy Thanksgiving From WKRP", and drop live turkeys from the helicopter. What could go wrong?
(YouTube video: "The turkeys are hitting the ground like sacks of wet cement!")
See the full episode on Hulu.