Nicola Coughlan opened up on one particular scene filming I Am Helen that left her feeling 'terrified'. The Bridgerton star is set to star in the powerful and impactful two-part drama alongside Joe Cole, which is airing on Channel 4 next Monday (16 November).Coughlan plays Helen, a character who has been married to Cole’s character Steve for five years, after which he starts displaying controlling, aggressive, and manipulative behaviour.