S1, E4: A villain named Leonard Snart (Wentworth Miller) gets his hands on a "cold" gun -- which could kill Barry; Joe gives Iris the silent treatment.

Starring Wentworth Miller, Emily Bett Rickards, Dominic Purcell
S1, E4: A villain named Leonard Snart (Wentworth Miller) gets his hands on a "cold" gun -- which could kill Barry; Joe gives Iris the silent treatment.