Adapted from the novel of the same name, the psychological mini-series follows the forensic psychiatrist Dr Emma Robertson (Emily Watson) whose latest patient Connie Mortensen (Denise Gough) has been accused of a horrific crime yet claims she cannot remember a thing.

With a distinguished career meeting many high security patients, Dr Robertson is rarely shocked, but the psychiatrist is caught off guard by Connie as the pair develop a dangerously close relationship.

Throughout their sessions, Connie begins to anticipate and exploit her doctor’s deepest insecurities.

Thalissa Teixeira (Trigonometry) also joins the cast as Ness Jones, Connie’s best friend. The pair have a complicated relationship, and Dr Robertson is keen to uncover whether it was this dynamic which made her patient snap.

As she digs deeper, however, Dr Robertson finds that her attempts to uncover the truth and seek justice threaten to destroy her instead.

The author of Too Close, actor Clara Salaman, has written the three-part series, which will be created by Snowed-In Productions.

Snowed-In Production’s Chief Executive Ruth Kenley-Letts commented: “I am absolutely thrilled that we’re finally shooting Too Close. 

“We’ve assembled such a talented cast and crew for Clara Salaman’s brilliantly compelling and gripping adaption of her novel and we’re so excited to be working with Polly Hill at ITV.  We can’t wait to get started.”