The new series is set to air this month, with Watkins leading the cast as Simon, a mild-mannered family man who is pushed to breaking point when everything in his life seems to take a turn for the worse.
As if things couldn't get more awful for him, he makes a split-second decision when he's confronted by local teenager Jordan (Joe Barber) outside his own home.
The start of the video sees Simon given the bad news about being made redundant, followed closely by wife Beth (Claire Skinner) handing over a letter from the mortgage company.
Simon then comes across a group of teenagers assaulting an elderly man, trying to interfere to get them to stop.
But it's that interaction that seems to rile up Jordan, who tracks Simon down to his home where the pair get into a scuffle, which leads to Simon punching Jordan – with fatal consequences.
The next we see is that Jordan has been rushed to hospital, with his parents left to watch on in horror as doctors attempt to save him.
But with the community labelling Simon as a 'local hero', it's not long before the truth comes creeping up on him, and grumpy neighbour Harry (David Bradley) tells Simon that he saw him and what happened on that fateful night.
Will Simon be able to keep the truth from coming out, or will he be found out sooner than he'd like?