The Unit season 4

The fourth and final season of The Unit started on September 28, 2008, and concluded on May 10, 2009. The season included 22 episodes and introduced Bridget Sullivan (Nicole Steinwedell) and Sam McBride (Wes Chatham), new members to the unit and the team.

A fifth season was planned as the show's last. However, on May 19, 2009, a week after the season finale, CBS declined to renew the series along with Without a Trace.

For the 2008-09 U.S. television season, the fourth season of The Unit ranked #43 with an average of 10 million viewers.

Main cast

 * Dennis Haysbert as Sergeant Major Jonas Blane, a.k.a. Snake Doctor
 * Scott Foley as Sergeant First Class Bob Brown, a.k.a. Cool Breeze
 * Max Martini as Master Sergeant Mack Gerhardt, a.k.a. Dirt Diver
 * Michael Irby as Sergeant First Class Charles Grey, a.k.a. Betty Blue
 * Robert Patrick as Colonel Thomas Ryan, a.k.a. Dog Patch
 * Nicole Steinwedell as Warrant Officer One Bridget Sullivan, a.k.a. Red Cap

Supporting cast

 * Wes Chatham as Staff Sergeant Sam McBride, a.k.a. Whiplash
 * Regina Taylor as Molly Blane
 * Audrey Marie Anderson as Kim Brown
 * Abby Brammell as Tiffy Gerhardt
 * Bre Blair as Joss Grey
 * Rebecca Pidgeon as Charlotte Ryan
 * Kavita Patil as Sergeant Kayla Medawar

Recurring cast

 * Susan Matus as Sergeant Sarah Irvine
 * Angel Wainwright as Second Lieutenant Betsy Blane
 * Alyssa Shafer as Serena Brown