The characters on Six Feet Under were fascinating to watch, but they often made horrible romantic choices. Even the couples that stood the test of time had their issues. Most of the truly memorable train wrecks didn't last, though. Here's a look back at some of the show's weirdest relationships.

Ruth Fisher and Arthur Martin - Ruth and Arthur's relationship was arguably the most awkward pairing in Six Feet Under history. Apart from the significant age difference, the relationship suffered from a lack of physical intimacy. You can't build a romance on nuzzling and spooning alone; it didn't take long for Ruth to figure that out. Ruth dumped Arthur, and things took a turn for the worse when she suddenly married George Sibley. Arthur showed his jealousy by arguing with George over the origins of the word "formica" and labeling his food. They finally parted ways after the "poo by mail" misunderstanding.

(S01E03) For a change of pace, In Plain Sight opted for a mainly comic episode. The results were mixed. The comedy wasn't really all that funny, and the plot was plagued by more than a few inconsistencies and holes. But once again, what's keeping viewers from switching to another channel is Mary McCormack as Mary Shannon. She's really a compelling actress, and this Mary Shannon is a complicated mess of a very cool character.

Mary's newest witness to be protected is a con artist, bigamist scumbag -- Mary's words -- named Treena. She ripped off her previous husband while on a Hawaiian honeymoon, getting away with $10 million in conflict diamonds before being arrested by the FBI. When Mary is forced to take Treena under her wing, she makes no secret of her antipathy for people of her ilk, saying, "God I hate con artists, even more than murderers."

There's an instant conflict between Treena and Mary, the uncooperative witness and unhappy marshal. Mary suspects that Treena is playing her and the system. She warns her that if you hang onto garbage from your past, sooner to later it starts to stink.

The machinations to get Treena into the WITSEC program is the first leap of faith in the episode. The second comes when she allows her picture to appear in the newspaper, announcing her sixth wedding.

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