Friends and Enemies
S4, E1: To stop an impending terrorist threat, Michael is drawn into a rather dubious alliance with a man named Vaughn. Meanwhile, he also helps Sam and Fiona look into a lawless biker gang.

S4, E1: To stop an impending terrorist threat, Michael is drawn into a rather dubious alliance with a man named Vaughn. Meanwhile, he also helps Sam and Fiona look into a lawless biker gang.