He was usually partnered up with Leonard “Captain Cold” Snart (portrayed by fellow Prison Break vet Wentworth Miller) but he quickly warmed up to the other Legends, and fit right in during recent Snart-free seasons.
Dominic Purcell first joined the Arrowverse after appearing in Season 1 of The Flash.
His small but important role as criminal Mick Rory earned him a spot on the Waverider in Legends of Tomorrow just a couple of years after.
His post makes it clear that Purcell feels quite fortunate to have been a part of this show for as long as he has, especially with everything going on in the world right now, so he’s definitely not leaving in anger.