“Amazing Race,” 7 p.m. to 9 p.m., CBS (new)
The final four teams head to Belfast, Ireland, where they must complete a task while snorkeling in a bog. The three remaining teams continue on to Washington, D.C., to battle for the million-dollar prize.
“Revenge,” 8 p.m. to 9:01 p.m., ABC (new)
Emily and Aiden both have to get used to Emily’s re-engagement to Daniel. Meanwhile, Jack is confronted with some surprising information.
“Family Guy,” 8 p.m., Fox (new)
The guys’ favorite bar closes up shop after the owner is murdered. Peter, Quagmire and Joe band together to try to keep it open.
“Red Widow,” 9:01 p.m., ABC (new)
Now that Marta believes that Schiller was responsible for Evan’s murder, she asks her father and Luther to help her devise a plan to get rid of him.
“Iron Chef America: Tournament of Champions,” 9 p.m., Food Network (new)
The first part of the “Tournament of Champions” features Iron Chef Geoffrey Zakarian against Iron Chef Alex Guarnaschelli. Both have already won in Kitchen Stadium. Who will walk out victorious?
“Mad Men,” 9 p.m. to 10:04 p.m., AMC (new)
Roger is trying out something new to pull in new clients. Will Pete undo all of his work after an uncomfortable encounter with a client?
“The Mentalist,” 9 p.m., CBS (new)
Jane narrows his list of Red John suspects to seven people, while the elusive killer targets someone from Jane’s past.
— Andrea Kszystyniak
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