What's the story?

Murder, Mystery and My Family.

Tell me more.

Criminal barristers Sasha Wass QC and Jeremy Dein QC investigate historic cases in an attempt to determine whether those convicted and sentenced to the death penalty were in fact victims of miscarriages of justice.

READ MORE: 13 unusual and quirky places to holiday in Scotland

This is the fourth series of the hit BBC daytime show (it regularly pulls in more than two million viewers). Previous episodes have led to some jaw-dropping revelations and a number of convictions that were found to be unsafe.

How does it work?

Wass and Dein re-examine the evidence, arguing the case for both the prosecution and defence. It's a bit like the genealogy-themed wonders of Who Do You Think You Are? but with a few more dark, brooding secrets and skeletons rattling out of the closet – and some sad stories too.

What can we expect?

The opening episode centres on the death of cotton broker James Maybrick in Liverpool on May 11, 1889. A post-mortem found traces of arsenic. As a result, his wife Florence was convicted of his murder.

READ MORE: Bushcraft expert Ray Mears on the secrets of wild cooking

Other cases explored in the series are a policeman shot dead in a country lane and an off-duty soldier convicted of killing a family friend.

When can I watch?

Murder, Mystery and My Family returns to BBC One, Monday, 10am.