Joan is starting on ITV this weekend

Helen Black has written Episode Four of the new six-part series based on the true story of Joan Harrington. 

Sophie Turner stars as Britain’s most notorious jewel thief, telling the story of how one devoted mother makes a series of difficult decisions to protect her daughter. Along the way, she becomes embroiled in the world of crime, donning multiple disguises in order to become the best in the business.

Joan launches on ITV1 and ITVX on Sunday 29th September at 9pm, with Helen’s episode airing on Monday 7th October at 9pm. The six-part series will be available to watch on ITVX after episode one has aired.

Watch a clip of Joan here.

Helen Black is represented by Frances Arnold.