Iris Liu

TK gets a huge surprise on his 30th birthday when his stepdad Enzo (guest star Henry Ian Cusick) arrives in Austin along with TK’s young half-brother Jonah; Owen’s resentment of Enzo turns physical; Tommy is determined to push through her latest crisis; Wyatt attempts to talk-down a suicidal caller and the 126 must perform a dangerous surgery in the field after a man is impaled in a tree.

A gang killing leads Carlos to new information on his father’s murder. TK contemplates a major life decision as Owen is determined to get Austin’s first responders’ health care coverages increased.

It’s Spring Break for GAU, but the well-deserved break brings some big changes when an old friend surprises Spencer (Daniel Ezra) and Jordan (Michael Evans Behling). Olivia (Samantha Logan) searches for the courage to share her truth, Patience (Chelsea Tavares) has a decision to make as her career skyrockets, and Layla has an eye-opening conversation.