CBS | 8:00 pm

This CBS reboot of a vintage ABC action series rattled its fans in the Season 2 finale by having its title character (Lucas Till) walk away from his work with the Phoenix Foundation, largely owing to a family conflict with his dad (guest star Tate Donovan). The Season 3 premiere, "Improvise," picks up the action three months later, as Mac is forced to set aside those father-son tensions and return to Phoenix after his buddy Jack (George Eads) is targeted by a murderous dictator.