John Corbett is on the case for CBS.

The Parenthood and United States of Tara actor has signed on to star in the network's potential NCIS: Los Angeles spinoff, The Hollywood Reporter has learned.

NCIS: Red revolves around a mobile team of agents who are forced to live and work together as they crisscross the country solving crimes. The back-door pilot will air in the spring as an episode of NCIS: LA.

Corbett will star as analyst Roy Quaid, a former NCIS special agent forced to retire from active service who now works as an analyst. While no longer an active agent, he's the most experienced investigator working for Red Team, a fact that is not lost on any other agents.

NCIS: LA's Miguel Ferrer will reprise his role in the potential spinoff as NCIS assistant director Owen Granger, while Red Dawn's Edwin Hodge will play Special Agent Kai, a computer expert and transport coordinator from South Central L.A. who was raised by his grandmother.

Corbett, whose credits also include Sex and the City and My Big Fat Greek Wedding, starred in cop drama pilot Widow Detective for CBS last fall. The drama from CSI's Carol Mendelsohn did not move forward. He's repped by Gersh and Lovett Management.