 On January 3, 2019, Stewart ended his brief retirement and signed for the Nottingham Panthers of the EIHL following in the footsteps of his elder brother who played there during the NHL lock-out in 2012.In the 2018–19 season, Stewart added a physical presence up front to the Panthers, notching 13 points in 23 games.Returning to North America in the off-season as a free agent, on July 17, 2019, Stewart was signed by former Wild and current Philadelphia Flyers general manager Chuck Fletcher to a professional try-out contract to attend the Flyers 2019 training camp.