Gotham (8 p.m., Fox) – With the help of Edward Nygma (eventually to become The Riddler), Gordon and Bullock search for a biology teacher who harvests glands from murder victims, while Mooney continues her scheme to gain power.
Jane the Virgin (9 p.m., CW) – Jane learns the baby’s sex (my money is on a girl), but a medical issue may interfere with her graduation. Meanwhile, Alba refuses to talk to Xo about an embarrassing topic.
Scorpion (9 p.m., CBS) – The team works undercover on a cruise ship to locate and disable stolen rockets. Also, Ralph has his first crush.
Antiques Road Show (9 p.m., UNC-TV) – Featured tonight are an 1821 U.S. citizenship certificate for a free man of color and a beauty book by Madam C.J. Walker.
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Better Call Saul (10 p.m., AMC) – “Saul” settles into its normal timeslot tonight. In the series’ second episode, Jimmy’s troubles escalate, leaving him in dire straits, and carelessness puts Chuck at risk. If you missed last night’s series debut, it repeats at 9.
Castle (10 p.m., ABC) – In the first episode of a two-part story arc, Castle and Beckett encounter an old rival, Dr. Kelly Nieman, while looking at clues in a woman’s mysterious murder.