NEW YORK — Jon Tenney has signed to star in Steven Bochco’s “Brooklyn South,” sources said, which is the first CBS series hatched under the web’s new deal with Bochco. Tenney’s the first name to land in the ensemble cast.Tenney will play Sgt. Donovan, around whom the drama, set in a Brooklyn police precinct, revolves. Bochco is executive producer with William Finkelstein and David Milch on the series, which CBS topper Leslie Moonves has tapped as the network’s biggest hope for a fall hit. The show’s produced by Bochco Prods. in association with 20th Century Fox Television. Pilot is set to be shot in April. Tenney co-starred with Matthew Perry and Salma Hayek in “Fools Rush In,” the Showtime pic “Twilight of the Golds” with Faye Dunaway, Jennifer Beals and Garry Marshall, and starred in the short-lived CBS sitcom “Good Company.” He’s currently starring in Richard Greenberg’s play “Three Days of Rain,” which is bound for New York after a limited run at the South Coast Repertory Theater. Tenney will next star with Brenda Blethyn in “Music From Another Room” and opposite Billy Bob Thornton and Kelly Lynch in “Homegrown.” The actor’s repped by UTA’s Martin Lesak, Jason Heyman and David de Camillo , and is managed by Kimberly Hines.