Billions spoilers follow. Billions' season 5 finale aired in the US on Sunday (October 3), and shocked fans by saying goodbye to Damian Lewis' character Bobby 'Axe' Axelrod.
Now, creators Brian Koppelman and David Levien have opened up about the character's exit, while teasing that "nothing is etched in stone" when it comes to ruling out a potential return later down the line.
In the last chapter's final episode, Axe called time on his romance with Wendy (Maggie Siff) and fled to Switzerland, after Paul Giamatti's Chuck set his plan to have Axe arrested in motion.
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