The Night Caller star Sean Pertwee was left devastated after one of his twin sons tragically died just four days after birth, with the other surviving against all odds

Sean Pertwee, the 60-year-old actor known for his role in the Channel 5 drama "The Night Caller," has shared the poignant vow he made to his son Alfred after the devastating loss of Alfred's twin brother. The twins were born prematurely at just 25 weeks back in 2001.