MythBusters This long-running show — in which hosts Jamie Hyneman and Adam Savage test urban legends, movie tropes, etc., with over-the-top experiments that occasionally end in explosions — airs its series finale, followed by a reunion special. 8 and 9 p.m. Discovery Channel
Saturday Night Live "21 Jump Street's" Jonah Hill returns for a fourth time as host, and rap music's Future performs. 11:29 p.m. NBC
Happily Ever Laughter: The Neuroscience of Romantic Relationships Veteran stand-up comic Yakov Smirnoff explores how laughter just might make...