In the repeat episode I'm Tired of Pretending, Teddy begins to feel insecure when Maddie spends time with Deacon. Meanwhile, Rayna struggles to find a balance between the two fathers in her life. ABC/Citytv, 9 p.m.
Jennifer Lopez and Harry Connick Jr. join Keith Urban to judge hopeful vocalists in this two-hour Hollywood Round episode. Ryan Seacrest is back to host this season, too, and Randy Jackson mentors contestants. Fox, 7 p.m.
In The Great Cathedral Mystery, scientists and engineers seek to understand -- and, on a small scale, re-create -- the innovative construction of one of the world's most impressive structures, Florence's Cathedral of Santa Maria del Fiore. PBS, 8 p.m.
David Letterman: Andy Samberg, Michael B. Jordan
Jimmy Kimmel: Abbie Cornish, Naughty Boy
Craig Ferguson: Kurt Russell, Aimee Garcia
The Daily Show: Joel Kinnaman
Conan O'Brien: Jhene Aiko