Peaky Blinders brought Alfie back in season 5, though. At the end of the season, Tommy goes and visits Alfie. While Alfie seems confused as to how Tommy knew he lived through the gunshot wound, Tommy explains Alfie wrote him a letter.

What season does Alfie come in?

Alfie is introduced during Series 2 as the leader of a Jewish criminal gang and owner of an alcohol distillery. He is in war with Italian mob boss Charles Sabini. Tommy Shelby tries to convince him to align with the Shelby brothers against Sabini but is not successful.

What episode does Tom Hardy appear in Peaky Blinders?

"Peaky Blinders" Episode #3.5 (TV Episode 2016) - Tom Hardy as Alfie Solomons - IMDb.