They seek the help of Professor Kenneth Raines to use recovered-memory therapy on John Gray to retrieve his memories, and come to suspect that their colleague Detective George Nesbitt is involved.

Bruce and Kenneth meet Angela's estranged brother Roy Gray in Pittsburgh, Pennsylvania to inquire about why he left the house.

Bruce and Kenneth suspect Roy's grandmother, Rose Gray, has some involvement but find nothing after a search of her house.

She tells him that her mother received miscellaneous calls and saw strange figures staring at her in the street before she herself had an accident.

He tells Kenneth that all these past memories are induced by therapy and the whole situation is just the result of mass hysteria.

Finally Bruce concludes that she was fabricating everything from the beginning as she wanted to escape from her family, whom she believes to be responsible for her mother's death.

On February 5, 2014, Emma Watson joined the film to star with Hawke,[6] and on March 25, David Dencik was added to the cast, playing a man who is arrested in a Minnesota town for allegedly sexually abusing his daughter.

Emma Watson stated, "First day shooting Regression today – a very cool birthday present xx.

On June 3, it was reported that Watson was back in Toronto to continue the rest of filming after spending some time in the UK and graduating from Brown.

[19][20] It was then pushed back to its eventual U.S. theatrical date of February 5, 2016,[21][22] and was released on Amazon Instant Video thirty days later.

The site's consensus reads, "Regression boasts a pair of eminently likable leads – neither of whom are able to dislodge the movie from the mire of psychological thriller mediocrity.

Mark Kermode, of The Guardian, wrote that the film was "largely forgettable fare, but at least its unhysterical heart is in the right place.