"The Biggest Loser" (8 p.m., NBC): The reality show continues with an episode that has our contestants visiting Olympic Park in Utah. There, they get fitness tips from Olympians, including speedskater Apolo Anton Ohno.
"Pretty Little Liars" (8 p.m., ABC Family): Hanna, Aria, Emily and Spencer (Ashley Benson, Lucy Hale, Shay Mitchell, Troian Bellisario) hope to find some answers in Ali's (Sasha Pieterse) diary. Now, if only all the entries weren't in code.
"Justified" (10 p.m., FX): As Harlan (Timothy Olyphant) tries to help a friend out of a jam, Dewey's (Damon Herriman) shady cousin Darryl (Michael Rapaport) pays a visit.
Also on Tuesday: