Masterpiece Mystery - Poirot: Hallowe'en Party (9pm, UNC-TV) - Poirot and Ariadne Oliver investigate the drowning death of a girl at a Halloween party who had claimed to have witnessed a murder years earlier.
Food Network Star (9pm, Food) - Guy Fieri shows up to film a segment of "Diners, Drive-Ins and Dives" with the contestants.
True Blood (9pm, HBO) - Sookie reunites with Tara and seeks a solution to her real estate problem. Also, Bill sends Eric to deal with a local coven of witches whose recent experiments could become a problem for the vampire community.
Treme (10pm, HBO) - The second season ends with Jazz Fest 2007.
The Marriage Ref (10pm, NBC) - The judges on tonight's panel are Tracy Morgan, Regis Philbin, and Susie Essman. The topics include an in-home tavern, sexy attire, and a ponytail collection.
Falling Skies (10pm, TNT) - Tom and his crew undertake a mission to retrieve motorcycles and cautiously allow marauder Pope to join them. But while on the mission, they're attacked by a harrowing entity that may be even more formidable than the Skitters.
Amsale Girls (10pm, WeTV) - Kori has an opportunity to work directly with Amsale, who's feeling pressure to meet expectations for her next collection. Meanwhile, Sam tries to control the chaos when the salon is understaffed on a busy weekend.