Elsewhere on TV ...
The Middle (7 p.m. ABC/Ch. 4): Frankie's first day at dental-assistant school does not go well.
The Voice (7 p.m., NBC/Ch. 5): The top 20 performances continue.
Nature (7 p.m., PBS/Ch. 7): "Animal Odd Couples" include a goat guiding a blind horse; a doe visiting her Great Dane surrogate mother; and a gibbon living with a family of capuchins.
The X Factor (7 p.m., Fox/Ch. 13): The top 12 singers perform.
Arrow (7 p.m., CW/Ch. 30): Oliver is arrested for murder.
NBA (7 p.m., ROOT): Los Angeles Lakers at Utah Jazz
The Neighbors (7:30 p.m., ABC/Ch. 4): Zabvronian mating season begins.
Criminal Minds (8 p.m., CBS/Ch. 2): A killer is targeting prostitutes in Miami.
Modern Family (8 p.m., ABC/Ch. 4): Jay tries to keep his ex-wife (Shelley Long) from finding out that Gloria is pregnant.
NOVA (8 p.m., PBS/Ch. 7): Investigating the 900 ancient statues on Easter Island.
Supernatural (8 p.m., CW/Ch. 30): Sam and Dean search for an avenging ghost.
Suburgatory (8:30 p.m., ABC/Ch. 4): George and Dallas take their relationship to the next level.
CSI (9 p.m., CBS/Ch. 2): Russell's son is a suspect in the murder of a basketball coach.
Nashville (9 p.m., ABC/Ch. 4): Rayna thinks about moving on when Deacon holds her at arm's length.
Chicago Fire (9 p.m., NBC/Ch. 5): Dawson faces disciplinary action.
NOVA scienceNOW (9 p.m., PBS/Ch. 7): What are animals thinking?
South Park (11 p.m., Comedy Central): Cartman is hiding something that could change the outcome of the presidential election.
Top Chef: Seattle (11 p.m., Bravo): A new round of competition begins.
American Horror Story (11 p.m., FX): A new patient exposes Arden's past.
Key & Peele (11:30 p.m., Comedy Central): In one sketch, LMFAO cannot stop partying.