Beyond the medical fake-out, Tommy’s survival is also tied to his character's "immortality" through the war.
Mosley used Dr. Holford—a fellow fascist—to convince Tommy he was dying, hoping Tommy would take his own life to avoid a slow deterioration. [S6E4] Why Is Tommy Still Alive?
However, the reason Tommy is "still alive" by the end of the series is one of the show's biggest twists. It turns out he was never actually terminally ill. The Great Deception Beyond the medical fake-out, Tommy’s survival is also
As of the latest developments, Tommy Shelby remains alive and is set to return for the upcoming Peaky Blinders feature film, where he must continue his fight against the rising fascist threat. However, the reason Tommy is "still alive" by
In Peaky Blinders Season 6, Episode 4, titled "Sapphire," Tommy Shelby receives a devastating medical diagnosis that seems to seal his fate: an in his brain stem. His doctor, Dr. Holford, gives him just 12 to 18 months to live, explaining that the growth was likely contracted from his daughter, Ruby.