Major Crimes (9 p.m., TNT) – In the Season 4 finale, the threads of seven murders are tied together, and the field of suspects is narrowed to three. Also, Mark Hickman confronts the truth about his past; Sharon uses an unreliable witness; and Provenza and Patrice solve their wedding issues.
Also on tonight . . .
Supergirl (8 p.m., CBS) – After being exposed to red kryptonite, Kara turns malicious and becomes a danger to her friends and to the people of National City.
The Bachelor (8 p.m., ABC) – Ben picks a woman, and a new Bachelorette and is named in “After the Final Rose” at 10.
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Ebola: The Doctors’ Story (9 p.m., HBO) – A special following a British emergency response doctor inside a Doctors Without Borders Ebola treatment center at the height of the epidemic in Sierra Leone. Followed by “Body Team 12” at 9:45 and “Orphans of Ebola” at 10.
Lucifer (9 p.m., Fox) – After the murder of a therapist, Lucifer and Chloe get Dr. Linda to help them search for a suspect.
Better Call Saul (10 p.m., AMC) – Jimmy chafes under his restrictive work environment, and Kim goes to extremes to dig herself out of a bottomless hole at HHM.