The Unit season 4

Main cast • Dennis Haysbert as Sergeant Major Jonas Blane, 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 == Episodes ==