Nick Sullivan - Tom Scully

Dennis Thomas "Tom" Scully, played by Andrew Larkins, made his first on-screen appearance on 5 May 2004. Tom is Joe Scully's brother. He was a Catholic Priest before he embarked on a relationship with Susan Kennedy. Larkins reprised his role of Tom in 2007.

Tom is Joe Scully (Shane Connor) brother and he arrives in Erinsborough in 2004. He is involved in a small scandal when he begins a relationship with Susan Kennedy (Jackie Woodburne). Television critic Andrew Mercado said that 2004 went down as "a watershed year for controversy" after Susan slept with Tom. Of her character's relationship with Tom, Woodburne said "They once had a very hot affair – he even left the priesthood for her – but they both felt it wasn't meant to be." Tom returns in 2007 and he becomes the Principal of Erinsborough High. He also tells Susan that he never stopped loving her and wants her back.

Tom was the more sensitive Scully brother. When Joe starts dating Lyn O'Rourke (Janet Andrewartha), Tom develops feelings for her, but he decides to leave and become a priest. When Tom is transferred to St Joseph's church in Erinsborough, he finds himself living a few streets away from Joe and his family. Tom makes friends with the neighbours and Susan Kennedy asks him out. However, he has to turn her down and she later finds out that he is a priest. Tom and Susan begin to spend a lot of time together, which leaves Lyn jealous and concerned that Tom was going break his vow of celibacy. Tom and Susan find that they have many things in common and they confide in each other. When Susan makes a joke that she could not be celibate herself, Tom walks out on her. Lyn tries to prevent Susan and Tom from spending time together and Tom notices. He confronts her and she tells him that her feelings for him are making her uncomfortable. Susan and Tom share a kiss and his feelings for her cause him to tell her that he needs to spend some time alone.

Tom is visited by a young woman who tells him that she is pregnant and that she told her partner that he is the father, when he is not. Tom encourages her to own up. Tom decides to leave the church for Susan, leaving Lyn appalled. Tom and Susan bump into Susan's ex-husband, Karl Kennedy (Alan Fletcher) and his girlfriend, Izzy Hoyland (Natalie Bassingthwaighte). Tom recognises Izzy as she is the woman who had confessed to him. Izzy later begs Tom not to tell Karl or Susan about her baby. Tom agrees and tells her to tell Karl herself, which Izzy agrees to. Tom struggles to find work outside of the church, but he eventually becomes a courier. Susan and Tom are happy until Susan realises that Tom's views are causing problems within her household. Tom realises that Karl has no idea that he is not the father of Izzy's baby and he tells Izzy to tell him or he will. Susan finds Tom at the church asking God for answers and she tells him that they cannot relate to each other. Tom decides to leave town and heads to Bendigo.

Tom decides to use his teaching qualifications that he earned and begins teaching at a small school. Tom applies for the position of Principal at Erinsborough High and he returns to Erinsborough as Susan's boss. Tom is shocked that Susan has reunited with Karl and the atmosphere at the school becomes awkward. Susan struggles with Tom's modern teaching methods and Tom tells her that he would be happy to accept her resignation, they later become friends. Karl is shocked to find Tom has returned and he becomes convinced that he and Susan are together. Karl confronts Tom, who tells him that he does not deserve Susan. Karl realises that Tom does not know Susan that well and is not threat to his marriage. Susan asks to meet Tom and she tells him that she loves Karl and many of the students turn on Tom for trying to come between Karl and Susan. Tom decides to resign and he tells Susan that he is going to Ireland to see some relatives.