John Simm Discovers Biological Father on ITV's DNA Journey

The actor learns his late father was not his biological parent, uncovering new family ties and a half-sister.

John Simm, known for his roles in Doctor Who and Life on Mars, found out his biological father is not who he thought.
Simm participated in ITV’s DNA Journey alongside co-star Philip Glenister, initially as a favor to Glenister.
The DNA test revealed that his biological father is Terry Smith, not Ronald Simm, the musician who raised him.
Simm discovered that Terry Smith frequented the same clubs where he and Ronald performed in the 1980s.
The journey led to a heartwarming meeting with his newfound half-sister, who shared memories and footage of their father.