Mack invites Paige and Tom to dinner at the MacKenzies' house. Mack attempts to exonerate Mark Baylor with the discovery of Ginny's money, but Mark threatens to accuse Mack of manufacturing evidence. Mark fires Mack when he refuses to plead him out. Karen guest co-hosts Open Mike and loves it. Michael and Linda double date with Harold and Olivia, who are arguing over money problems. Frank convinces Mack to get other retirees who lost their pension to file a class-action lawsuit against Oakman Industries. Mack shares the info with Tom, who pays a visit to one of the retirees, claiming he is working on Mack's behalf. The retiree ends up with a broken arm. Tom is revealed to be working for Oakman and is ordered to stop seeing Paige.