Hardcastle and McCormick

A convict who has been having an affair with the warden's wife, escapes with her help. He then calls Hardcastle, which agitates him. He and McCormick go out to find him, clearly there is something personal between them but he is not saying what it is. Eventually, it's revealed that before Hardcastle chose McCormick, he gave this guy a try and he proved Hardcastle wrong. Now he is out and wants to get back at Hardcastle. He goes to the mansion and holds Sarah hostage but Hardcastle and McCormick arrive and apprehend him.