Asking for a TV series name

I remember watching a TV series star with 2 couple as detectives, the show might be a bit old like early 2000s or late 1990s

I remember a specific episode from the show that's about a man with his 3 wives riding an RV, the man is so dominant and abusive towards his wives and forces them to do anything for him, the RV was being chased by the cops and the chase ends up with the wives killing the man then surrendering to the police