We all wish for happily ever afters, but we get a kick out of watching love gone wrong. That's where shows like "Deadly Affairs" (10 tonight, Investigation Discovery) come in. Love doesn't just go wrong in these re-enactments, love kills.

So each episode features two real-life stories of love triangles that ended in murder. Actual friends and family discuss the cases along with journalists and law officers. Actors depict the affairs, arguments, deaths.

Hosting it all is "All My Children" icon Susan Lucci. The funny thing is she's playing Erica Kane, vamping it up, talking about her numerous husbands, and narrating each story with cheesy lines. It's like live-action pulp fiction.

It's all pretty routine; in a world where the Drew Peterson case makes national news, the story of the seemingly loving husband who kills his wife to be with his mistress isn't all that special. It's Lucci's presence and arch and campy comments that make the whole thing a little special, and fun, which is sort of sad when you think about the idea of making murder entertaining.
 

Sand Sharks (7pm, Syfy) - A movie about prehistoric sand tiger sharks that attack a wild beach party following an underwater earthquake. Please stay tuned for "2-Headed Shark Attack" (see below) at 9.

My Cat From Hell (8pm, Animal Planet) - In tonight's season finale, a couple can't figure out how to get their cats to stop fighting. We also get to see the People's Choice Award for Golden Kitty winner from last week's first ever Internet Cat Video Festival in Minneapolis.

Ed Sullivan's Top Performers 1966-1969 (8pm, UNC-TV) - A special highlighting classic "Ed Sullivan Show" performances by top music acts of the 1960s, including the Animals, Association, Beach Boys, Beatles, Byrds, 5th Dimension, Mamas & the Papas, Rolling Stones, Supremes and others.

2-Headed Shark Attack (9pm, Syfy) - Another Syfy instant classic: A group of terrified college students escape to an abandoned feef after their ship comes under attack from a mutated shark. They fight for their lives as the waters begin to rise and the two-headed beast comes back for seconds.

Puppy Love (9pm, Hallmark) - Now for something totally different: A sweet movie about neighbors who form an unusual arrangement to share custody of a dog, and who then find themselves falling in love with each other. See Adrienne's review.

The Incredible Dr. Pol (10pm, Nat Geo Wild) - A veterinary student shadows Dr. Pol for a day as he treats a downed cow at a nearby farm and visits a local breeder and trainer of racehorses.

Deadly Affairs (10pm, Investigation ID) - A new series featuring true stories of love affairs that turned deadly. In tonight's premiere, a clandestine affair spells danger for a funeral director and his wife. Here's what Adrienne thought.