'Bones' spoilers: 5 things to know about 'The Cheat in the Retreat'

With ongoing problems between Booth and Brennan, "Bones" really ought to go to couples' counseling. A murder is of course the best way to do it! That's the basis of the investigation in Monday's (Sept. 23) episode, "The Cheat in the Retreat."

This also gives the show a chance to trot out undercover alter egos, Tony and Roxie. They're very loud and entertaining versions of Booth (David Boreanaz) and Brennan (Emily Deschanel).

Although it would be mean to ruin any of the surprises around those two, here are five "Bones" spoilers to prepare you for the rest of the episode.

1. Did you know that you can consider a bobcat to be just "a cat named Bob"? That's what the animal control person says shortly before some non-feline remains are found in a back alley...

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