Caitlin Harris

When Lyndsey's mother comes for a visit, Alan suggests she meets Evelyn. Walden is stuck hearing iPhone app ideas from Jake and Eldridge.

A viral outbreak threatens the staff and patients of Angel's Memorial Hospital, leading to a quarantine.

Leanne faces a huge decision as the hospital staff work to find a cure for the fatal virus infecting residents.

A downtown gas explosion sends dozens of casualties to the hospital. TC, Drew and Gwen scramble to the chaotic scene as Topher leads the team at the hospital. Meanwhile, Paul delves into his first night in surgery rotation while dealing with the unexpected arrival of his neurosurgeon father.

Cooper and Kelly pretend to enjoy dating other people in an attempt to make each other jealous; Neal and Barry date a polyamorous woman.