|Birth Name||S. Irvine|
|Death||Killed by a Centurion, "Valley of Darkness"|
|Portrayed by||Michael Tayles|
|S. Irvine is a Cylon|
|S. Irvine is a Final Five Cylon|
|S. Irvine is a Human/Cylon Hybrid|
|S. Irvine is an Original Series Cylon|
|S. Irvine in the separate continuity|
Lt. S. "Flyboy" Irvine is the callsign of a Viper pilot on Galactica. Under the command of Captain Lee "Apollo" Adama, and accompanied by Louanne "Kat" Katraine, Irvine protects Adama as he attempts to destroy a Cylon Heavy Raider (TRS: "Scattered"). Irvine proves he can be reckless, as well as jokes a lot in the cockpit, even in dire situations.
When Galactica is infiltrated by Cylon Centurions, Irvine is among the first to happen upon the interlopers as their group attempts to make their way from the hangar deck. He is killed by a Centurion in the ensuing panic (TRS: "Valley of Darkness").
- Name and rank from Official Battlestar Galactica Props & Costumes Auction Archive listing for Lt. S. "Flyboy" Irvine's nameplate.