Trivia: In Season 18 Episode 18 (Boys of Bummer), the announcers at the ball game are an American from KBBL radio and a Mexican from QUE BBL radio. QUE is pronounced "K" in spanish.
The Mook, the Chef, the Wife, and Her Homer - S18-E1
Trivia: When Martin Prince talks to Otto complaining that Kearney has stolen his instrument, the two pens in his shirt pocket look like "SS"-Runes. (00:01:35)
Answer: I'm not sure if this is the one you're thinking of, but an episode of "Ray Bradbury Theatre," called "A Sound of Thunder," dealt with a similar matter: a group of hunters travel back in time to hunt dinosaurs, only to find things have changed when they get back because someone stepped on a butterfly.
Xofer