Wiseguy is an American crime drama television series that aired on CBS from September 16, 1987, to December 8, 1990, for a total of 75 episodes over four seasons. The series was produced by Stephen J. Cannell and was filmed in Vancouver, British Columbia, to avoid the higher studio costs associated with filming in Los Angeles. Stephen J. Cannell Productions produced Wiseguy in association with Paramount Television.

Wiseguy originally starred Ken Wahl as Vinnie Terranova, a Brooklyn native and Fordham University graduate who was a deep cover operative for the FBI under the supervision of senior agent Frank McPike, played by Jonathan Banks. The primary cast was rounded out by Jim Byrnes, who played an information operative known as Lifeguard (real name Daniel Burroughs) who assisted Vinnie in the field.

After the third season, Wahl departed from the series. Steven Bauer was brought in to replace Wahl as the lead, with Cecil Hoffman joining as a fourth regular cast member alongside Bauer and the returning Banks and Byrnes. Wiseguy ended its run midway through 1991 with three produced episodes left unaired.