“Boston Public” star Nicky Katt has scored one of the leads in the ABC drama “The Evidence,” while Aisha Tyler (“24”) has joined the cast of CBS’ untitled John Gray project, and Scott Foley (“Felicity”) and Regina Taylor (“I’ll Fly Away”) have been added to Eye drama pilot “The Unit.”

Also scoring roles Tuesday were Bernadette Peters, Neil Patrick Harris, Jason Segel and Lizzy Caplan. Meanwhile, on the producing front, John Wirth has been added to CBS’ comedic drama “Love Monkey” as showrunner.

Katt will star as Detective Shawn Riley in “The Evidence,” opposite Orlando Jones and Martin Landau. Warner Bros. TV/John Wells Prods. drama pilot revolves around two cops (Jones and Katt) in San Francisco.

Katt most recently appeared in Woody Allen’s play “Second Hand Memory.” His other credits include the features “School of Rock” and “Insomnia.”

Over on the Eye’s untitled Gray project, sometimes referred to as “The Ghost Whisperer,” Tyler will play Andrea, the best friend to Jennifer Love Hewitt’s lead character.

Touchstone drama revolves around paranormal investigators. Tyler’s credits include guest stints on “Friends” and “24,” as well as serving as the final host on E!’s “Talk Soup.”

As for Taylor and Foley, thesps will star as part of the ensemble on “The Unit,” 20th Century Fox and Shawn Ryan/David Mamet’s take on the elite Delta Force.

Taylor’s most recent credits include “The Education of Max Bickford” and the feature “The Negotiator.” Taylor scored an Emmy nom for her role as Lilly Harper in “I’ll Fly Away.” Foley, meanwhile, guested on “Scrubs” and starred in the short-lived “A.U.S.A.” He’s still best known for his work as Noel Crane in “Felicity.”

Peters, meanwhile, will star as Mrs. Leaf in the ABC sitcom pilot “Adopted.” Twentieth Century Fox TV laffer revolves around a grown man who discovers he has two very different mothers — Peters’ character being one of them.

The stage star’s most recent credits include the telepic “Prince Charming” and guest stints on “Frasier” and “Ally McBeal,” as well as the features “It Runs in the Family” and “Let It Snow.”

Caplan has scored one of the lead female roles in the WB’s untitled Liz Tuccillo pilot, a drama (from Warner Bros. TV and Class IV Prods.) about adult sisters residing in Manhattan.

Thesp’s recent credits include “Mean Girls” and Fox’s short-lived laffer “The Pitts.” She also guested on cult faves “Freaks and Geeks” and “Undeclared.”

Harris, who recently played himself in the feature “Harold & Kumar Go to White Castle,” will star as Barney in the CBS comedy pilot “How I Met Your Mother.” Laffer, from 20th Century Fox TV, revolves around a man who flashes back to his younger self.

Also joining the pilot is Segel (“Freaks and Geeks”) as Marshall.

Harris, best known for starring as “Doogie Howser, M.D.,” also headlined the laffer “Stark Raving Mad.” Segel’s other credits include “Slackers.”

In other castings, Julie Ann Emery (“Hitch”) has joined the cast of ABC’s “Commander in Chief” as secret service agent Joan Greer. Move reunites her with exec producer Rod Lurie, who produced “Line of Fire” (which also starred Emery). Emery was also seen in “Taken” and “ER.”

Over on “Love Monkey,” Wirth will exec produce the Sony/Gran Via/Paramount hourlong pilot alongside Mark Johnson and Michael Rauch. Wirth’s credits include “The District” and “Nash Bridges.”