What to Watch This Weekend: The Mentalist and Four Other Finales, Dad's Milestone and More

Red John's RulesOn TV this weekend: Zach Galifianakis hangs over at Studio 8H, Jason Collins outlines his Next Chapter, American Dad! hits a milestone, Revenge re-engages; and The Amazing Race, The Mentalist and three other shows finish their seasons. As a supplement to TVLine’s original features (linked within), here are 15 programs to keep on your radar.

SATURDAY, MAY 4

8 pm Smash (NBC) | An unexpected event bonds Bombshell and Hit List.

8 pm Cops (Fox) | Season 25 finale: Officers from the Las Vegas Metro PD stop a woman who appears to be soliciting prostitution on the Strip. Heavens to Betsy! A prostitute? In Las Vegas?! (Not yet renewed.)

8 pm Doctor Who (BBC America) | Bodies with waxy, glowing, red skin turn up in Victorian Yorkshire.

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10 pm The Nerdist (BBC America) | Kenneth the Page meets Faith the Slayer when 30 Rock‘s Jack McBrayer and Buffy‘s Eliza Dushku join Chris Hardwick for the evening.

11:30 pm Saturday Night Live (NBC) | Zach Galifianakis (the Hangover films) hosts for a third time; Of Monsters and Men is the musical guest.

SUNDAY, MAY 5

7:30 pm Oprah’s Next Chapter (OWN) | 90-minute episode: NBA player Jason Collins sits down for first interview since coming out as the first openly gay active pro athlete in a major American sport.

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8 pm The Amazing Race (CBS) | Two-hour season finale: The action ends in Washington, D.C., where the final three teams race through the city for the ultimate $1 million prize. (Already renewed.)

8:30 pm Austin & Ally (Disney Channel) | Austin and Ally decide their “official” coupledom won’t interfere with their professional relationship, which is great… until their “official” coupledom interferes with their professional relationship.

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9 pm Revenge (ABC) | Aiden struggles with Emily’s re-engagement to Daniel, and Jack learns more than he bargained for.

9 pm Game of Thrones (HBO) | Robb considers a compromise to repair his alliance with House Frey; Jon, Ygritte and the Wildlings face a daunting climb.

American Dad9:30 pm American Dad! (Fox) | The animated series’ 150th episode takes place in the slave spaceship that abducted Jeff (with Roger’s help). To get home, Jeff must prove to the evil Emperor Zing (guest-voiced by Michael McKean, Laverne & Shirley) that he was always in love with Hayley. Sean Hayes (Will & Grace) also lends his voice to milestone episode.

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10 pm The Mentalist (CBS) | Season finale: Red John strikes at a victim with links to Jane’s past. Warning: This one’s a cliffhanger. (Get a smidgen of scoop.) Laura San Giacomo (Just Shoot Me) guest-stars as a social worker. (Yep, already renewed.)

10 pm Mad Men (AMC) | Roger changes tack to make new business. Pete has an awkward run-in.

10 pm Red Widow (ABC) | Season (series?) finale: Marta asks Andrei and Luther to help kill Schiller – who she now believes murdered her husband. (Not yet renewed; find out its current status.)

10 pm Bletchley Circle (PBS) | Miniseries finale: Susan tells the other women she was face-to-face with the killer – and he let her go. What she doesn’t know: He’s obsessed with her, and he’s leading her into a trap.

Hit the comments with your must-see picks from tonight’s lineup!