"Pretty Little Liars" (8 p.m., ABC Family): This special episode plunges into the world of a 1940s black-and-white noir film, complete with period costumes. Why? Because a frazzled, pill-popping Spencer (Troian Bellisario) loses touch with her own reality and wakes up in a new/old one.
"Westminster Kennel Club Dog Show" (8 p.m., USA): Let's hear it for the mutts! For the first time ever, the storied dog show is allowing mixed-breed canines to compete in a new agility event, which is fine with us because we like rooting for the underdog.
"New Girl" (9 p.m., Fox): Uh-oh, there's big trouble in the loft when Jess' loud and wild big sister (Linda Cardellini) drops by for a visit.
Also on Tuesday: