Tonight’s prime-time TV highlights:

“NCIS” 7 p.m., CBS (season finale)

The 12th season comes to a close with the team investigating a global terrorist group that recruits teens on the Internet.

“The Flash” 7 p.m., CW (new)

The Flash gets help from Arrow and Firestorm after Barry seeks aid from Captain Cold.

"Marvel’s Agents of S.H.I.E.L.D.," 8 to 10 p.m., ABC (season finale)

Season 2 ends with all-out war, and sacrifices are made by Agent Coulson and his team. It sounds like not everyone will survive...

“American Idol” 8 p.m., Fox (live)

The first part of the Season 14 finale sees one finalist eliminated and the other two singers performing.

“NCIS: New Orleans” 8 to 9:01 p.m., CBS (season finale)

This show’s debut season winds down with a search for a mole within the NCIS.

“Chicago Fire” 9 p.m., NBC (season finale)

As the third season ends, Casey digs into Nesbitt’s affairs, while Severide questions his judgment and Dawson gets some life-altering news.

“Inside Amy Schumer” 9:30 p.m., Comedy Central (new)

Amy directs a commercial for pizza and offers a big apology.

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