Yeah, I wonder about this. I like Mike and all, but he seems to be mailing it in this season. I'd rather they end this show and he moves on to something else than run it into the ground.
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EDIT - I finally went with Mythbusters. It's the longest-running show on Discovery that I watch, and it's still a lot of fun. I probably would have gone with Storm Chasers as that's a heck of a show, but their full season is only 8 episodes, and that's too few IMO. Here's hoping they have enough material to run a full 22 episodes this year.