HE DIED IN ALL GALACTICA SERIES...

So sad he passed away, thanks to him the Battlestar Galactic cult was alive till come back in force in the reimagined series. But is curious that he died in all seasons.
Galactica Season 1 - Apollo was killed by Count Iblis and resurrected by the "angels"
Galactica 1980 - It´s specified in Episode 1 that Apollo was killed in combat
Battlestar Galactica Reimagined Series - He is the villain Tom Zalek and was executed in final season.

RIP