On last night's season premiere of 'In Plain Sight' (Wed., 10PM ET on USA), Donnie Wahlberg guest starred as a father in witness protection who isn't afraid of a little revenge.

When his teenage son is beaten, Donnie hunts down the assailant and threatens to shoot him, an action he's apparently familiar with. I.S. Marshal Mary Shannon (Mary McCormack) interrupts the proceedings, but has a different type of vengeance in mind ...
Watch the video after the jump. On last night's season premiere of 'In Plain Sight' (Wed., 10PM ET on USA), Donnie Wahlberg guest starred as a father in witness protection who isn't afraid of a little revenge.

When his teenage son is beaten, Donnie hunts down the assailant and threatens to shoot him, an action he's apparently familiar with. I.S. Marshal Mary Shannon (Mary McCormack) interrupts the proceedings, but has a different type of vengeance in mind ...