Season 4, Episode 9 (12:01 minutes) - When Cochise (Doug Jones) brings 2nd Mass members to a Volm supply depot with high levels of toxicity dangerous to humans, he instructs them to wear gas masks for protection. When Mira (Desiree Ross), a friend of Matt Mason (Maxim Knight) from the Espheni Youth Re-Education Camp, shows up - she is given a gas mask as well. This dual canister 'North' one-piece gas mask worn by Mira has green and black silicone rubber construction and a full face piece of clear plastic.