Mary Kills People
Bloom Appliances
Mary head to Olivia's work to confront her about the appliance-based threats in episode 2x02 “The Connection”. Mary heads to the warehouse to tell Olivia that her husband is dead in episode 2x03 “Twin Flames”. Ben talks to Olivia about her husband's disappearance and plants a bug in her office in episode 2x04 “Ride or Die”.
Appears in 2 additional episodes.
Come to Jesus
Olivia is shot by a sketchy delivery driver and the police storm the warehouse but don't find any evidence.
Fatal Flaw
When Mary goes to pick up the drugs, Olivia reveals that they will have to go to a second location.