John Simm left ‘questioning everything’ after discovering he and his father were not biologically related during emotional episode of ITV’s DNA journey: ‘It spun my world out!’

Actor John Simm has found out the man who he thought was his biological father, in fact is not.

Starring alongside his best friend Philip Glenister in the first episode of the fifth season of ITV’s DNA Journey, Mr Simm found out revelatory facts about his past.

John Simm and Philip Glenister met 17 years ago when they become the actors behind the police duo Sam Tyler and DCI Gene Hunt from Life On Mars.

Now in their first TV appearance since the BBC drama, Simm said he only participated in the show so that Mr Glenister wasn’t on his own.

Upon taking a DNA test, Mr Simm found out the news about the man he thought was his biological father.

Actor John Simm has found out the man who he thought was his biological father, in fact is not

Upon taking a DNA test, Mr Simm found out the news about the man he thought was his biological father (John's true biological father Terry Smith pictured)

Upon taking a DNA test, Mr Simm found out the news about the man he thought was his biological father (John’s true biological father Terry Smith pictured)

Starring alongside his former Life On Mars co-star Philip Glenister (R) in the first episode of the fifth season of ITV ¿s DNA Journey , Mr Simm found out revelatory facts about his past

Starring alongside his former Life On Mars co-star Philip Glenister (R) in the first episode of the fifth season of ITV ’s DNA Journey , Mr Simm found out revelatory facts about his past

He said: ‘It spun my world, and everything I thought I knew, wasn’t real.

‘It’s turned out to be such a massive thing in my life and all I was doing was a favour for Phil Glenister so he didn’t have to do it on his own.’

Recalling a conversation, he had with his mother before taking the test, Mr Simm said: ‘When they had me, in the sixties, they were both young.

They were together and then they split up and were both with other people and then they got back together and then they had me.

‘And I’d never heard this story before.’

Mr Simm revealed that he had considered pulling out of the show but decided to utilise the experts to find out about his biological father.

During the episode Simm is told that his biological father has passed away but discovers that he lived in the same area as Simm and would drink at the same working men’s clubs that he and his father did.

‘The thing that blows my mind, me and my dad, we played around here loads of times, we definitely played here a lot and he might have been in the same pub one night and watched me play,’ he said.

He said: ¿It spun my world, and everything I thought I knew, wasn¿t real' (pictured with wife Kate Magowan in 2013)

He said: ‘It spun my world, and everything I thought I knew, wasn’t real’ (pictured with wife Kate Magowan in 2013)

More revelations, Mr Simm also discovers that he has a half-sister Karen (pictured) whom he meets at the end of the episode, sharing memories with her about his biological father.

More revelations, Mr Simm also discovers that he has a half-sister Karen (pictured) whom he meets at the end of the episode, sharing memories with her about his biological father.

He admitted: ¿It¿s turned out to be such a massive thing in my life and all I was doing was a favour for Phil Glenister so he didn¿t have to do it on his own'

He admitted: ‘It’s turned out to be such a massive thing in my life and all I was doing was a favour for Phil Glenister so he didn’t have to do it on his own’

Mr Simm revealed that he had considered pulling out of the show but decided to utilise the experts to find out about his biological father

Mr Simm revealed that he had considered pulling out of the show but decided to utilise the experts to find out about his biological father

‘I can’t get it out of my head, because we played this area in the 80s and he was here, and he was in working in men’s clubs.

‘It’s one of those mad, Back To The Future, Life On Mars things.’

More revelations, Mr Simm also discovers that he has a half-sister whom he meets at the end of the episode, sharing memories with her about his biological father.

The new episodes of DNA Journey will also feature Ricky Tomlinson and Sue Johnston and James Nesbitt and Sarah Parish.

The pals first appeared together in smash hit BBC series Life On Mars in 2006

The pals first appeared together in smash hit BBC series Life On Mars in 2006

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