He played Gareth Broadhurst, a former soldier with PTSD in a three-part special of the show released in 2013 entitled Doctors: War Zone.

[1][7] Shortly after moving to Los Angeles, Henry spent a year perfecting his American accent in order to expand his range as an actor.

[7] In July 2016, it was confirmed that Henry’s character would be featured as a regular on the show beginning in the 14th season, which aired on September 20, 2016.

He eventually moved in with his aunt and held various jobs including selling shoes on Oxford Street, and in a theatre in Leicester Square, where he "was sacked for daydreaming and practising his autograph.

He stated that growing up they were hit with reality, and where he grew up showed him where he does and does not want to be in life; it made him work much harder to achieve his goals.

[3] Henry has stated that if he were not an actor, he would still be involved in the arts, perhaps teaching drama to younger generations, or as a talent scout.