"ER" alum Goran Visnjic is in negotiations to star opposite Katee Sackhoff in the ABC drama pilot "Boston's Finest," which also has cast Nia Long.

Additionally, Dougray Scott and Molly Parker are set to star in CBS drama presentation "Quinn-Tuplets."

In other pilot castings, Josh Henderson is leading the cast of the CW's drama "Betwixt," Randall Park has joined the Fox comedy "Tax Man," and Omid Abtahi has boarded Fox drama "Pleading Guilty."

"Finest" centers on a detective (Katee Sackhoff) who teams with a disgraced ex-cop (Visnjic) to solve crimes and untangle the conspiracy that sent him underground. Long, repped by Gersh and Hyphenate's Glenn Rigberg, will play her friend, mentor and partner.

Following his nine-year stint on "ER" playing Dr. Luka Kovac, Visnjic co-starred in the 2009 CBS movie "The Courageous Heart of Irena Sendler."

"Quinn-Tuplets" follows the personal and professional lives of the Quinn quintuplets. Scott will play Michael, the documentary filmmaker who has chronicled the quints' lives. Parker will play their mother, who was single when she had them in-vitro but subsequently married Michael and had another daughter.

On "Betwixt," about three teenagers who discover they are changelings, Henderson ("Desperate Housewives"), repped by Innovative and Impression, will play the leader of the group who sees a halo of light around people who are about to die.

On "Tax Man," set at an IRS office in Fresno, Calif., Park ("Dinner for Schmucks") will play a fiercely loyal IRS auditor. He is repped by TalentWorks and manager Judy Orbach.

"Guilty" is a legal thriller about embezzlement and the politics of a high-powered firm where Abtahi ("Sleeper Cell"), repped by Greene and Associates, plays the youngest associate.