The programme stars Amanda Redman as Lindsay Carter, a mother of four who decides that her criminal family is going to change its ways after her husband is sent to prison.
Honest also stars Danny Webb, Sean Pertwee and Camille Coduri.
Most of the filming was carried out in Staines, including at the local school, Matthew Arnold.
However Episode 5 dropped to 3.2 million viewers, reflecting direct competition with Fabio Capello's debut as England football manager on Match of the Day[5].
The final installment saw figures rally by 800,000 to 4 million, an increase of 17% taking second place in the 9pm slot to Channel 4's Grand Designs [6].