Three's Company S05E20 - Dying to Meet You

When Larry and Jack are having some drinks at the Regal Beagle, they notice a pretty girl and start flirting with her. However, when her boyfriend arrives, it doesn't take long for him to start threatening the guys for talking to his date. While Jack takes his threats seriously, Larry starts egging him on, and as a result, the boyfriend sets his sights on fighting Jack in order to get them away from his girlfriend.