In Plain Sight - Season 1 Episode 4

Horst Vanderhoff, who reportedly works for a high-priced contract killer, gets popped by the F.B.I. negotiating a hit. With promises of delivering the boss, Lola, he goes into Witsec. While transporting Horst, Mary and Marshall are ambushed in the middle of nowhere, Marshall is shot, but they manage to force the would-be killers to retreat. Finding an abandoned building, they take cover and prepare to defend themselves when the assassins return at nightfall to finish the job.