NCIS Gibbs (Mark Harmon) and his team work with the FBI and MI6 to locate a British spy who’s a threat to other operatives. The season finale marks the final episode of founding cast member Michael Weatherly. Robert Wagner, Sarah Clarke and Duane Henry guest star. 8 p.m. CBS
The Voice Alicia Keys and OneRepublic perform. 8 p.m. NBC
The Flash Katie Cassidy guest stars as Earth-2 resident Black Siren, who helps Zoom (guest star Teddy Sears) assault Central City. 8 p.m. KTLA
SoCal Connected This new episode of the local news magazine series...