Dexter Tomorrow at 9 p.m., Showtime
“Dexter’’ changed this year. No longer fiercely holding on to his code, our serial-killing hero stopped his weekly vigilante murders, caused a few innocent deaths, and obsessed over the Trinity Killer to the point of self-disclosure. The show, largely thanks to John Lithgow, also veered further than ever into camp. I still found the season entertaining, and Michael C. Hall was as compelling as ever; but the writers lost some of my reverence as they lost control of the plot details. Plus, Rita was more annoying than ever. Tomorrow night: the finale.
Saturday Night Live 11:30 p.m., Channel 7
Few actors become as buzz-plagued as fast as Taylor Lautner. That’s what being in a blockbuster movie franchise, gaining 30 pounds of muscle, and taking off your shirt will do. He’s the host tonight, with musical guest Bon Jovi.
Video Game Awards 8 p.m., Spike
The seventh annual attempt to get them to watch TV.
Christmas in Canaan 8 p.m., Hallmark Channel
Texas. Rustle up them reindeer.
Holmes on Homes Tomorrow at 10 p.m., HGTV
Crowded entry, my dear Watson.
Clash of the Dinosaurs Tomorrow at 8 and 9 p.m., Discovery
Camouflage and camouflage are a no-no.
Christmas at the White House Tomorrow at 10 p.m., Channel 5
Oprah, Obamas, Obamas, Oprah.