Ed travels to Dublin and Belfast to try and speak to the people linked with the 1974 Birmingham bombings.

We visit Belfast to meet a former IRA prisoner Ricky who believes there could be more to the pub bombings in Birmingham.

Discussing the case and whether the IRA spy Freddie Scappaticci, known as ‘Stakeknife’, could be a reason no-one has faced justice.

Julie Hambleton's sister died in the bombings, she is intent on a public inquiry and explains what she thinks really happened that night.

We also explore whether the government knew what was going to happen.

Exploring some of the names linked with the Birmingham pub bombings.

We also find out why Chris Mullin and Julie Hambleton disagree with each other.

After a lot of frustration, Julie Hambleton, whose sister had died in the bombs, and the families of other victims secure an inquest with help from an unexpected source.

Exploring the impact of The Birmingham Six's release which opened up old wounds for some of the victims’ families.

The investigation was reopened in 1991 and shut again in 1994 with no further movement until Julie Hambleton, whose sister had died in the bombs, started a campaign for justice.

The Birmingham Six had each been sentenced to 21 life sentences. They were writing letters for support but getting no reaction and all hope was lost that they would be freed.

Their story reached journalist and former MP Chris Mullin who set out not just to prove their innocence, but to also find out who actually did.

Paddy Hill and Billy Power, two of the Six, talk frankly about their treatment in police custody and court.

The official side of story doesn’t match up with what the Birmingham Six experienced.

Explore how the police tracked down and arrested the men who later became known at the Birmingham Six.

BBC reporter Michael Buerk talks about covering their high-profile trial and convictions.

We also hear how Birmingham’s sizeable Irish population were treated in the days and months following the bomb attacks.

The story of the blasts told by those first on the scene.

Emergency services crew and local reporters describe the aftermath of two city-centre pub bombings in Birmingham that killed 21 people.