EW: How excited were you when you found out they were going to do a Buck backstory episode?

Oliver Stark discussed the emotional fourth season "Buck Begins" episode in an exclusive interview with The Knockturnal.

Throughout the first four seasons of 9-1-1, Oliver Stark’s Evan Buckley — a.k.a. Buck

We've added screenshots from Episode 4, "9-1-1, What's Your Grievance?," of Season 4 of 9-1-1.

We've added screenshots from Episode 3, "Future Tense," of Season 4 of 9-1-1.

Getting in touch with his feelings. During the Monday, January 25, episode of 9-1-1, it was revealed that Oliver Stark‘s

TMI with Oliver Stark and Rafael Silva.

We've added screenshots from Episode 2, "Alone Together," of Season 4 of 9-1-1.

We've added screenshots from Episode 1, "The New Abnormal," of Season 4 of 9-1-1.