Plot hole: When Diana turns up at her director friend's house she finds it crawling with cops as his girlfriend Christie has been murdered and the house is now a crime scene. She explains she lent Christie a coat and is there to pick it up - and a cop helpfully finds it on the floor and hands it to her. Are we to believe that a homicide policeman will hand over an artifact from a murder scene to an unidentified woman without making any attempt to confirm her identity, or even if the coat is even hers!? They don't even ask.
Plot hole: When John tries to start his car with the flat battery the least he should have done is switch the windshield wipers off. (01:33:50)
Plot hole: After Frank and Freddie accidentally release the trioxin gas, there are several shots of the gas entering a return air vent and traveling through the heating, ventilation and air conditioning system belonging to the warehouse. Finally the gas exits into the freezer directly on to a hanging cadaver. This room was previously confirmed as a freezer and would have had its own self contained refrigeration system with its own ventilation system. Typical freezer doors also seal as they close. The cadaver would have never come into contact with the trioxin gas and would have never reanimated.
Plot hole: In the airport scene when Chance runs through security after Cody, he is chased by an airport police officer. During later shots you can see the officer in hot pursuit not far behind Chance. Yet when he gets to the exit gate beside the washroom where Cody was hiding, Chance spends several seconds scanning the gate area before setting off to the washroom. Surely the airport officer would've long caught up to Chance by then, but instead the same officer does not re-appear until some time later after Chance has intercepted Cody in the washroom.
Plot hole: It's never explained why Frances Parker would be upset about Cay pursuing Vivian. She knows she's gay, but we're never told why she's mad.