Radical is the fourth episode of the first season of S.W.A.T.
Starring: Shemar Moore (Daniel "Hondo" Harrelson), Stephanie Sigman (Jessica Cortez), Alex Russell (Jim Street), Lina Esco (Christina "Chris" Alonso), Kenny Johnson (Dominique Luca), Peter Onorati (Jeff Mumford) (credit only)
Guest Starring: Patrick St. Esprit (Robert Hicks), Louis Ferreira (William "Buck" Spivey), Bre Blair (Annie Kay), Shane Coffey (Kevin Lynch), Marcus Giamatti (Professor Lasky), Michael Benyaer (Tarek), Freda Foh Shen (Dean Hargrove), Mandy June Turpin (Agent Conley), Lindsay Musil (Maya), Cooper Andrews (Reggie Lee),
After a domestic bomber dies in a Highland Park explosion, the SWAT team races to find the man's partner before more devices detonate. Also, Hondo reaches out to Buck, his former team leader, when he worries he is isolating himself after his recent firing.