What to Watch Sunday: The Mentalist Hits 100, 666 Park's Boo Bash, a Dexter Discovery & More

On TV this Sunday: The Mentalists 100th episode is a knockout, 666 Park Avenue doesn’t ghoul around with its Halloween party, Dexter knows Hannah’s hiding something and The Walking Dead says, “Hello, Governor.” As a supplement to TVLine’s original features (linked within), here are 10 programs to keep on your radar tonight.

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8 pm The American Scream (Chiller) | Documentary: Three haunted house aficionados try to get their Massachusetts town into the Halloween spirit by turning their homes into fear factories.

8 pm Call the Midwife (PBS) | Nonnatus House responds to cancer and a doomed money-making venture.

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9 pm The Good Wife (CBS) | When the feds arrest drug dealer Lemond Bishop’s accountant, Alicia and Diane are forced to work with his other lawyer (played by Law & Order: Criminal Intent‘s Annabella Sciorra). Meanwhile – shocker! – Nick creates more trouble for Kalinda.

9 pm The Walking Dead (AMC) | Andrea and Michonne find a new community; a decision must be made.

9 pm Boardwalk Empire (HBO) | It’s Easter Sunday, and Eli wants to get back on Nucky’s good side. Meanwhile, Gyp seeks out Joe Masseria’s blessing, and Gillian makes a sacrifice to improve her future.

9 pm Dexter (Showtime) | Dexter discovers that Hannah McKay is hiding a dark secret.

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10 pm 666 Park Avenue (ABC) | All hell breaks loose as the Drake prepares for its annual Halloween gala: Jane finds herself targeted by a spirit from the suitcase, Brian jealously questions Louise about her rendezvous with Dr. Evans and one of Gavin’s crucial possessions goes missing.

10 pm The Mentalist (CBS) | Flash back to when Jane first met Lisbon and the rest of the CBI team in the series’ milestone 100th episode. Kirk Acevedo (Fringe) guest-stars.

10 pm Treme (HBO) | Fats Domino tickles Davis’ fancy, Antoine seeks reading help for Jennifer, and Toni and L.P. get a witness.

10 pm Homeland (Showtime) | Brody finds himself prisoner again — only this time on American soil.

Which of the above is must-see for you? Also, hit Comments to offer your own tune-in suggestions.

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