Adam Fitzgerald - Nick Nixon

Leigh "Nick" Nixon, played by actor Brian Vriends, is regular character Donna Freedman's biological father. He made his first on-screen appearance on 9 April 2010.

Vriends is best known for his role as Ben Markham in All Saints. Executive producer, Susan Bower promised that this will be a "must see" storyline for both actors. Bower said: "The Freedman family have provided fantastic drama for us so far and we have lots in store for Brian, it's great to have him with us". Nixon arrives in Ramsay Street under a cloud of suspicion.

When Donna Freedman's (Margot Robbie) mother Cassandra (Tottie Goldsmith) reveals that Matt Freedman is not her biological father, Donna begins a search for her real father. While sorting through some boxes from her Grandmother's house, Donna finds Cassandra's diary and with the help of her friends, tries to discover who might be her father. They manage to narrow the search down to two men called Nick, a university lecturer and an ex-football player. Donna then sends letters to both men asking if they could be her father. She receives a reply from the football player, Leigh "Nick" Nixon and arranges to meet him, however, she can't go through with the meeting and he leaves. Donna goes to his restaurant and calling herself Kelly, asks him for a job. When Donna spots Nick kissing a member of staff, she quits her job and calls Nick a "sleezebag" for cheating on his wife. Nick later explains that his wife is dead. Donna then tells him that she might be his daughter. Nick shows Donna a box of items that he saved for her and Donna asks him to take a DNA test. Donna gets the results of the test back and reveals that Nick is her father.

When Donna is injured following an accident at a building site, Nick rushes to the hospital after receiving a call from Rebecca Robinson (Jane Hall). Nick thanks Rebecca and Paul Robinson (Stefan Dennis) for looking after Donna and he tries to keep Ringo Brown (Sam Clark) away from her. Ringo confronts Nick and Nick tells him that he does not want Donna getting hurt again, Ringo then explains that he loves Donna. Ringo and Donna later get back together, but Donna tells Ringo that she would like Nick's approval of their relationship first and Nick gives them his blessing. Ringo then decides to propose to Donna and Nick tells them that they are too young and Donna rejects Ringo. Nick and Donna argue and she later decides to propose to Ringo herself. Nick tells them that he will support them and he shakes Ringo's hand. In the build up to the wedding, Nick meets Ringo's mother, Prue (Penny Cook). They do not get on and argue with each other. Donna and Ringo ask them to be nice and when Donna goes to see Prue, she discovers Nick in Prue's hotel room. Prue and Nick explain that they no longer dislike each other and that they ended up together in the room to talk. On the day of the wedding Nick tells Donna that their car has broken down. They get a lift with Lucas Fitzgerald (Scott Major), but are stopped by the police. They eventually arrive at the venue and Nick gives Donna away. Nick comes to see Donna and Ringo when they get back from their honeymoon. Donna asks her father to help her take over Charlie's while Rebecca spends her time at the hospital with Paul. Nick returns to town to comfort Donna after Ringo dies. When Donna's car breaks down on the way to the funeral, Nick tells her that he will come and get her. However, Donna tells him to go to the service to represent her. Nick visits Donna and she tells him that she is going to New York because she got into a design school. She asks him to look at her designs and he tells her that he dislikes them. Donna then decides not to go to New York and Nick and her friends try to persuade her to change her mind. Donna later tells Nick and Susan Kennedy (Jackie Woodburne) that she is scared of letting Ringo down. Donna changes her mind again and Nick tells her that he will come with her for a few weeks.