I use it in Science class nearly every week. Even I'm shocked by how many kids we have in a mostly minority school that watch the show. It's just good TV! And you learn good stuff while watching it.
Deadliest Catch is great. You should check out Everest Beyond the Limit. Have been watching that show since last season. If you want to know the definition of tough, check out the sherpas on that show. One of them summited everest 12 times!!