Kiele Sanchez, Martha Plimpton and three others go to Showtime

Showtime is staffing up its Matthew Perry pilot.

Kiele Sanchez, Martha Plimpton, Eddie Shin, Nate Torrence and Dreama Walker have joined the cable network's dark comedy pilot "The End of Steve," according to The Hollywood Reporter.

The story centers on Steve (Perry), a bitter, self-centered local talk show host who is seeking a bigger market and is half-heartedly on the way to redemption. Perry and Peter Tolan are writers and executive producers on the project, which promises to show a darker side to Perry.

The cast additions are rounding out the talk show staff. Sanchez plays Steve's attractive co-host, on whom he has a crush, while Plimpton will act as the talk show's producer. Shin will play Steve's boss, Bob Hu, while Torrence will be Steve's assistant Nathan.

Outside of the work environment, Walker will play the teenaged hottie daughter of Steve's apartment manager.

Sanchez has appeared on "Samantha Who?" as Chloe and was one of the most despised characters, Nikki Sanchez, on "Lost" before she was killed off. Plimpton received a Tony nomination for starring in the revival of "Pal Joey" opposite Stockard Channing. She also has a movie career that spans three decades that includes "The Goonies," "Parenthood" and "I Shot Andy Warhol."

Shin may be remembered for playing Henry Cho on "Gilmore Girls" and starring on the short-lived "That '80s Show." Torrence co-starred with Perry on "Studio 60 on the Sunset Strip" and recently appeared in the "Get Smart" update with Steve Carell. Walker plays the doe-eyed Hazel, one of Blair Waldorf's followers, on The CW's "Gossip Girl."