Jack Callahan is a fictional character from the Australian soap opera Neighbours, played by Andrew Morley. The actor was cast in late 2015 and landed the regular role of Jack. Morley had previously played Spencer Harrington in fellow soap opera Home and Away for two years. He made his first appearance during the episode broadcast on 4 April 2016. The character departed on 30 March 2018, but Morley later reprised the role and returned on 26 February 2020, as part of the show's 35th anniversary celebrations.

When Jack first arrives, he is involved in the explosion at Lassiters hotel and left unable to recall his identity. Morley described the character as one with a "clean slate" due to his amnesia and lack of family ties or connections to Erinsborough. Two months after his arrival, his name and identity as a Catholic priest was revealed. His storylines have subsequently focused on the conflict of his religious vocation and relationship with Paige Smith (Olympia Valance).

His storylines have also focused on his rivalry with Mark Brennan (Scott McGregor) despite Morley stating that Jack has a lot of respect for him and feels that he is a good role model for his son. The character made a tough decision over leaving the priesthood and viewers have expressed negative feelings towards his relationship with Stephanie Scully (Carla Bonner) with one calling their relationship "disgusting" and another seeing the coupling as "random". Katie Baillie from Metro UK showed her compassion for Jack but later felt that he didn't act like an adult when he gets into a fight with Mark.

Casting On 31 January 2016, Holly Byrnes from The Daily Telegraph announced the former Home and Away star Andrew Morley's casting on Neighbours as John Doe. Morley was asked to film an audition tape after he had received an email from his manager whilst in Cambodia helping raise money and awareness towards human trafficking. Morley began filming in December 2015. Morley commented on working with Paige Smith actress Olympia Valance describing her as "extremely friendly" and of a "great energy". Valance reminded Morley of Demi Harman, who he worked with early on on Home And Away.

When Morley first got the role, he was not briefed on what his character's true identity was and where the character was going. He also said that his character's alias 'John Doe' was still written on his scripts at times he was filming scenes under the name Jack. He later added that he now knows what direction his character is going in and said, "it'll be a big story arc". He also said that the audience will be taken through "a really interesting journey of trying to work out who he is" in finding out what his character is doing in Erinsborough, what significance his character is going to have and who his character will be involved with. Morley added that his character has a "clean slate" as he has no connections to anyone in Erinsborough.

Development Introduction and characterisation Jack arrives in Erinsborough with no family ties and a 'mysterious past' of which Paige helps him discover. Morley said that "Paige helps him to discover who he is", together they work out why he is in Erinsborough. Morley said, "It's been fun piecing together the puzzle." After he is involved in a fire at the Lassiter's complex in his first scenes, he suffers amnesia. Determined to find out his past, Paige becomes curious in Jack and decides to visit him in hospital, later becoming fascinated by him. With his details unknown, he is given the name John Doe. When talking about John's future identity, Morley described it as "completely off the scales". He also guaranteed that nobody would pick what his character turns out to be. Morley said "It's a good little journey and the audience is going to love it."

He later remembers that he is a Catholic Priest and goes to the police station to inform them of his past and his true identity is confirmed as Father Jack Callahan. Jack is described to be a "man of God" and to have "devoted his life to religion and helping people", with being a "genuine, kind, sincere and loving person". His reasonings for being in Erinsborough were also revealed, with Jack only passing through and staying at a friends house. He was at Lassiter's on the day of the blast off to help someone who had talked to him during confession.

Relationship with Paige Smith After the explosion at Lassiter's, Paige visits John Doe in hospital, hoping to find out about his past. Mandy Franze (Kristy Best) turns up and claims she knows John and is the love of his life. After Mandy kisses John, Paige is forced to accept that she has lost him for good. Paige falls for John and the feeling is mutual, with Morley describing it as "true love for both of them" and that "Jack has never felt like this about anybody." However, with John revealed as Jack Callahan, a Catholic priest, Morley also explains that it will be a dilemma for Jack on deciding who he will devote his life to. Paige meets Dustin Oliver (Kevin Clayette), a person from Jack's past, and kisses him, much to Jack's dismay. After Jack dreams of a kiss with Paige, he goes to Father Guidotti (John Orcsik), the local priest for advice. He later prays and asks God for a sign.

After Father Guidotti dies, Jack sees this as the sign he asked for from God, with Jack feeling his death was down to God allowing him to continue his work in Erinsborough. With Paige feeling upset about Jack's decision, she confesses to her mother, Lauren Carpenter (Kate Kendall), that she is unable to think straight around him, vowing to keep her distance. However, after she realises Jack shares the same feelings as her, she decides to boycott the plan and spend as much time around him as possible. Paige later goes to confession and tells Jack of her recent hookups, to show that she has moved on from him. Daniel Kilkelly from Digital Spy commented on Paige's visit to confession saying, "Jack Callahan is probably used to awkward confessional visits every now and again, but this one really takes the biscuit".

After Paige dresses up as a nun, Jack feels like she is making a mockery of what he believes in. This leaves them no longer on speaking terms, but after Paige goes on a hot air balloon trip that ends up crashing, Jack comes to find Paige and the pair sleep together. However, an old friend of Jack's, Simone Bader (Kahli Williams), turns up in Erinsborough and after finding out Jack had slept with Paige, she questions if she is worth leaving the priesthood over. Paige finds out she is pregnant with Jack's baby, but decides against telling him. When Jack comes to Paige's rescue after she is involved in a car accident, she reveals to Jack that the baby is his. Paige considers leaving Erinsborough to move to Queensland along with her parents, taking the baby away and leaving Jack behind, but ultimately decides to stay. Paige goes back to where the baby is conceived and goes into labour and gives birth to a son, Gabriel Smith (Kian Bafekrpour). Jack along with Karl Kennedy (Alan Fletcher) come to Paige's rescue and takes her and the baby to hospital.

The pair later reunite and sleep together, betraying both their partners. Morley commented in an interview with Radio Times, "At that moment and with Gabe in front of them, everything felt so right and they went for it. That gave Jack hope but afterwards Paige wants to bury it and forget it happened. This hurts Jack who wants to tell Steph, even though he knows she'd be upset, but Paige is not of the same mindset and regrets it." He added, "Most of the feedback suggests fans want Jack and Paige to be together. It was hard playing the Steph and Jack relationship because it didn’t have the substance he had with Paige, so naturally the audience isn't going to believe in it as much. I loved working with Carla Bonner (Steph Scully) as we get on great and hang out a lot. But the audience will want Jack with Paige, though Paige is committed to Mark Brennan (Scott McGregor) who is a great guy and a lovable character... Fans will be torn as no one is the villain here, and everyone ends up getting hurt in some way."

Relationship with Stephanie Scully After Steph helps Jack look after his son, Gabe, they develop feelings for one another and have sex. However Paige later bans Steph from being around Gabe due to her past mental health issues. This causes Steph to end her relationship with Jack, feeling that he needs to focus on his family and believing that things wouldn't have worked out with Jack in the long run anyway. Continuing their relationship however, Jack realises he is not Steph's priority when 'having a relationship' didn't feature on a list of what she wants to do in her life.

After Steph returns from a Christmas break with her mother, Steph expects to see Jack waiting for her when she returns, however instead he is with Paige. When he eventually sees Steph, he cancels his lunch with her to spend time with Gabe and Paige, but Steph insists she comes along too. She later becomes irritated as Jack's attention is focused on Gabe during the outing. However, Steph talks to her friend Toadfish Rebecchi (Ryan Moloney) about her concerns, feeling the age difference between herself and Jack may be too big. Toadie later gives Jack advice on how he can keep Steph happy in their relationship.

On 25 January 2018, Sasha Morris from The Daily Star questioned if this was the beginning of a love triangle between the couple and Paige. On 5 February 2018, Daniel Kilkelly from Digital Spy reported that Jack and Paige would have a one-night stand. Kilkelly also reported that Steph would seek revenge when she finds out about the affair with her ransacking Jack's room at the backpackers in a fit of anger but later confesses to the police of her actions. This brings repercussions for Steph as her planned trip for visiting her son in Fiji is ruined as her overseas visa is revoked due to the criminal charges for the damage.

Rivalry with Mark Brennan

On 13 November 2017, it was reported by Kilkelly (Digital Spy) that Jack would "drive" Paige and Mark's relationship apart when he discovers that the pair are arguing. Jack challenges Mark about his behaviour, but without an explanation Mark is forced to steer clear from Paige and his baby.

Later, in December 2017, Digital Spy reported that Jack would get into a "violent" fight with Mark in the new 2018 season. After Gabe is kidnapped, with Paige dating Mark, he becomes involved and tensions rise between the pair. With Elly Conway (Jodi Anasta) and Amy Williams (Zoe Cramond) determined to get Jack and Mark on better terms, they decide to get them together with a game of Croquet. But a feud starts to arise and meets its climax when the pair have a "full-blown brawl" in public. Sophie Dainty from Digital Spy described the scenes as "explosive". During the fight, Jack's anger causes him to tell Mark how he really feels and blames Mark for his son's recent abduction.

After Paige discusses the "awkwardness", "occasional violence" and how Jack feels threatened by Mark as he feels he is "muscling in on his family", Paige goes to see Jack. When Paige turns up, old feelings arise from their previous relationship and Jack ends up sleeping with Paige. When asked in an interview with Radio Times about how Jack feels about Mark — Morley replied, "Jack has a lot of respect for him, he's nice guy and a great role model for Gabe. However he wasn't thinking of Mark's feelings when he slept with Paige, although Jack is upset that he's hurt the guy. Paige truly wants to settle down with Mark, but she knows what she did with Jack and her mind is in two places at once..." On 17 February 2018, Kilkelly (Digital Spy) reported that tensions may be flaring up again when Mark's temper puts Gabe in danger whilst with Paige and Jack.

Departure and return