| Harry Tressler | |
|---|---|
| Holby City character | |
 Jules Knight as Harry Tressler | |
| First appearance | "The More Deceived" 14 May 2013 |
| Last appearance | "Go the Distance" 14 April 2015 |
| Portrayed by | Jules Knight |
| In-universe information | |
| Occupation | Speciality Training Year 3 |
| Family | Billy Tressler (father) Elizabeth Tressler (mother) |
| Significant other | Gemma Wilde Mary-Claire Carter |
| Children | Callum Teo |
Harry Tressler is a fictional character from the BBC medical drama Holby City, played by Jules Knight. He first appeared in the fifteenth series episode "The More Deceived", broadcast on 14 May 2013. Harry was introduced as a CT1, later progressing to CT3. Knight's casting was announced in January 2013. He auditioned four times, with the producers taking two and a half months to choose him for the part. To help prepare for the role, Knight shadowed a surgeon and watched a laparotomy. In February 2015, it was announced that Knight had quit the show in order to concentrate on the release of his first solo record. Harry departed during the seventeenth series on 14 April 2015.
Harry was portrayed as arrogant, privileged, clever and a rule breaker. He is a good doctor, who looks out for his patients. Knight liked that Harry was a "love to hate" character, as he did not want him to be boring. Harry was also billed as a womaniser and a love triangle developed between him, Gemma Wilde (Ty Glaser) and Mary-Claire Carter (Niamh McGrady). Harry and Mary-Claire eventually settled into a casual relationship, before Harry realised that he loved her. Harry developed a rivalry with new registrar Raf di Lucca (Joe McFadden) and he had an affair with Raf's wife Amy Teo (Wendy Kweh). In revenge, Raf tried to sabotage Harry's career. The character's final storyline arc saw him suffer serious facial injuries in a fall. Knight said Harry was frustrated by appearance as he had always relied on his good looks.