Here's a look at tonight's sci-fi TV:
Chuck, 'Chuck Versus the Other Guy - Tonight's episode was originally intended to air as a season finale. Things changed, of course, after NBC picked up six more eps to fill out the season. So consider "Chuck Versus the Other Guy" the end of a chapter in Chuck's (and the show's) life. Tonight might also be the last time we see Brandon Routh as Shaw, which is a little disappointing considering how good he's been in the role. But it looks like Sarah has unwittingly driven him to the dark side. It's Chuck to the rescue as Shaw plans to take his revenge. (9 p.m. ET on NBC)
Monster, 'The Cruelest Thing' – The critically-acclaimed anime series starts its U.S. run tonight with two back-to-back episodes. (11 p.m. ET on Syfy)
Head after the jump for clips and more TV picks.