Vincent Simard

TK gets a surprise on his 30th birthday when his stepdad arrives in Austin; Owen's resentment of Enzo turns physical; Wyatt talks to a caller thinking about suicide; the 126 must perform a dangerous field surgery 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; Owen is determined to get Austin's first responders' health care coverages increased.