Jack Hannah (Shortland Street)

The character of Jack was created as a guest character for the show,[1] scheduled to appear for 4 episodes.[2] Jack was written as the "First XV rugby player for Ferndale High" in what was to be a short storyline.[1] Reuben Milner was a teenage actor that had previously "turned his nose up" at working on Shortland Street and told himself that, "no matter what happens, if I get offered a part on Shorty, I'll turn it down."[3] Despite this, he auditioned for the role of Kane Jenkins,[1][2] a character created to depict teenage suicide.[4] Milner lost out on the role but his audition was archived and he was recalled in February 2014 to audition for the role of Jack.[1] He explained his change of mind in taking the role as, "I figured out how hard it was to get auditions let alone land parts, so when I was in my final year of high school and they asked me to audition, I was like, 'Yes, Yes, Yes!'"[3] He was cast as Jack and described himself as being, "shell-shocked" onset as he was, " looking around and thinking 'I know these people' and I'd be like 'OK that's them'. I was quite nervous but as soon as I got on set, because I've experienced set life before, I was like 'Oh yeah, this is all right'"[2] Following the end of his stint, Milner's contract was extended over various guest stints before signing a regular contract in November 2014.[2] Milner was pleased with this extension, stating, "When I heard the news, I was like, wow, this is amazing. I loved it. It's another step up for my acting."[1] In 2015 Milner was informed by producers that they intended to make Jack a permanent character and have a family unit introduced around him.[5] Following the departure of the Hannah family onscreen throughout 2019,[6] Jack remained as the last member before Milner departed the soap in mid 2019 and acknowledged, "It's going to be hard to wake up and say I'm not Jack any more."[7] Jack's final scenes aired on 7 August 2019.

In 2020 fuelled by fan demand, Producers asked Milner to reprise his role for a guest stint to reunite with on-screen brother Jayden Daniels (Curtis Hannah).[6] Milner returned to the show in 2021 in a regular role and described it as, "coming back from a holiday" and giving him the ability to "reignite the passion".[8]

Jack was the captain of the Ferndale High rugby squad and quickly became friends with new student Kane Jenkins (KJ Apa) but disliked his friend Toby Reynolds (Robert Evison). Jack supported Kane through his depression, but it soon became clear it was more than friendship when Jack tried to kiss Kane; the two fell out. Jack began to bully Kane, but ultimately they reconciled. Jack came out as gay to his friends and family. The following year, Jack began to date his homework tutor Edwin (Maxwell Apse) and subsequently struggled with his father Mo (Jarod Rawiri)'s uneasiness with the same-sex relationship. The relationship was short-lived; however, the academic help enabled Jack to continue his pursuit of medicine. Jack reconciled with his father following the death of his sister Pixie (Thomasin Mackenzie), who succumbed to cancer. Whilst doing bar work to pay for university, Jack fell in love with chef Cam McCaskill (Ryan Carter) despite his asserted heterosexuality. Storing Cam's drugs, Jack narrowly avoided arrest when his brother Curtis (Jayden Daniels) took the blame for him and got jail time. Feeling guilty, Cam entered into a passionate relationship with Jack that was short-lived and resulted in Cam fleeing Ferndale. Jack's classmate Charlie consoled him and the two began dating. However, Jack soon realised that Charlie was addicted to prescription medication (which he had taken to help him study), eventually succumbing to the urge himself. Mo managed to ease Jack off the drugs. Charlie was sent to a rehabilitation clinic. The drug ordeal also put an end to a promising relationship with a policeman that Jack had pursued. Jack again found love in the form of professional sportsman Dion Tai (Sonny Tupu). Despite initial hesitation to come out, Dion was inspired by Jack and the two enjoyed a brief romance before he succumbed to cancer, lying in Jack's arms.

Later in the year, Jack met and fell in love with new doctor Lincoln Kimiora (Alex Tarrant) but shortly into the relationship realised he was a high-functioning methamphetameme addict. Despite this and increasing jealousy over Lincoln's previous romance with Nicole (Sally Martin), Jack became besotted with Lincoln and started taking drugs to impress him. This saw Jack develop a severe addiction, drop out of medical school, overdose twice, break his arm, and became reliant on Lincoln whom was falling in love with Nicole. Trying to help Jack, Lincoln proposed and bought a house for the two to share. Deciding to become fathers whilst Jack recovered from his addiction, Nicole realised she was pregnant from her previous relationship with Lincoln and permitted the two men to adopt the baby when it arrived. Jack faced further struggles after surviving a plane crash but losing his father Mo. Lincoln secretly spiralled heavily into drug addiction and began an affair with Jack's ex Charlie. Nicole's daughter Kiri ended up arriving prematurely and dying, leading to Lincoln fleeing Ferndale having been exposed as a drug addict and a cheat. Returning to medical school, Jack struggled with continued loss when his widowed-stepmother Kate (Laurel Devenie) departed leaving him as the sole Hannah in Ferndale. In Mid-2019 Jack met Matiu (Shadon Meredith) but romance seemed to be off the cards when Jack struggled to learn his new boyfriend was HIV positive. Helped by his best friend Dawn (Rebekah Palmer), Jack came to accept Matiu's illness and the two fell in love. In July Jack's mother Margaret returned to Ferndale and was shockingly diagnosed with cancer. Opting to leave medical school to care for her, Jack and Margaret were instead convinced by Matiu to relocate to Waiheke island to heal so that Jack could still attend his university. After an emotional farewell to the hospital, Dawn and reminiscing on baby Kiri with Nicole, Jack and Margaret departed to live with Matiu.

In 2020, Esther (Ngahuia Piripi) was invited to attend Jack's wedding to his husband, Matiu. Later in the year Jack returned to Ferndale to undertake a medical placement at the hospital under the guidance of Esther. The death of Phoenix Warner (Geordie Holibar) reminded Jack of the losses in his family whilst in Ferndale and he opted to cut his placement short. Jack returned the following year having landed a permanent role as a doctor in the Emergency Department, with Matiu to join him in the coming months. However Jack was devastated to learn Matiu had cheated on him with several men and the marriage ended. He briefly dated Zack Parker (Jack William Parker) before falling in love with Rico Hamilton (Sonam Hoani) but refused to break up Rico's long running relationship. He was devastated when Curtis was murdered whilst undercover in gangland Christchurch, and began dating the cop investigating, Hamish (Simon Arblaster). Despite several gang related incidents, Jack strongly defended Hamish only to discover he was corrupt and had contributed to Curtis' death. Devastated, he helped hand Hamish into the police. Struggling with romance for months, Jack fell helplessly in love with closeted senior hospital Manager Raj Prasad (Mel Odedra) only to be dumped within weeks.

After Shortland Street burnt down at the end of 2022, Jack would end up working at Central along with several other former Shortland Street staff. After clashing with the homophobic Emmett Whitman (Stephen Lovatt), Jack and his crew quit after Chris managed to reopen the hospital. With the cult Brightshine taking over ownership of Shortland Street, leader and new CEO Rebekah Anderson (Antonia Prebble) would have two interns file a false grooming complaint to get Jack stood down when he began to be suspicious of Rebekah. After the charges were dropped and a brief feud with Viliami To'a (Theo David), Jack would falsely accuse a former gang member of assaulting his daughter. Realising he was burnt out, Jack decided to quit and head overseas. He would leave in May 2023 and take Dawn with him.

The character of Jack and his coming-out storyline was said to inspire other homosexual men in similar situations, with Milner being told that, "one of his mates took a lot of inspiration from Jack. His story gave him a lot of courage to open up about his sexuality after hiding it for so long."[3] Jack's departure in 2019 amidst the death of Kiri was said to be one of the show's saddest moments.[6]