Subsequent storylines for Mason have revolved around his romantic relationships with Evelyn MacGuire (Phillipa Northeast), Olivia Fraser Richards (Raechelle Banno), and Beth Ellis (Anneliese Apps), with the latter helping to bring awareness to organ donation in Australia.

On 5 December 2015, Jonathon Moran from The Daily Telegraph reported actors Orpheus Pledger, Jackson Heywood and James Stewart had joined the cast of Home and Away as brothers Mason, Brody and Justin Morgan respectively.

[1] Pledger was living with his mother and brother in Melbourne when he was offered the role of Mason, which required him to move to Sydney, where the show's studios are located.

[2] Pledger said his 2011 role as Noah Parkin on fellow Australian soap opera Neighbours helped him prepare for the workload and the pace of filming.

[3] Ahead of his screen debut, Pledger described Mason as having a "positive outlook on life", being family orientated, and "a hopeless romantic".

[10] After Tori is threatened by Spike Lowe (Jason Montgomery), the family's police liaison officer Atticus Decker (John Adam) has them moved to a safe house.

[12] Blaine produces a gun and threatens to kill them all, before revealing that Justin knew the truth about the circumstances that led to their parents' deaths.

Justin attempts to warn the pilot, Duncan Stewart (Benedict Wall), but a broken pipe leaks carbon dioxide into the cabin and everyone passes out.

[14] Later developments in the storyline saw the Morgans meet Decker's nieces Hope (Jessica Falkholt) and Raffy Morrison (Olivia Deeble).

[15] A DNA test confirms their suspicions, but before they tell Raffy, Hope steals Mason's car and attempts to leave town with her.

[19] Mason becomes concerned when Evie insists that she survived the plane crash because her deceased brother Oscar MacGuire (Jake Speer) is watching over her.

[20] Determined to prove her theory, Evie takes Mason out in her car and begins driving recklessly, as she is convinced that she will not crash.

[19] A reporter for The Daily Telegraph noted the arrangement would not last long, after Northeast was photographed filming a kissing scene with Alec Snow, who plays Matt Page.

[21] Producers later paired Mason with Olivia Fraser Richards (Raechelle Banno) and formed a love triangle storyline with her ex-boyfriend Hunter King (Scott Lee).

[22] Pledger told Alison Gardner of What's on TV that Mason "really likes" Olivia and readily accepts her invitation to accompany her to the formal.

Pledger said that Mason "acts completely out of character" when he hits Hunter and is left feeling ashamed after Alf breaks up the fight.

Mason and Olivia are soon caught having sex at the Summer Bay Auto garage by Brody and Irene Roberts (Lynne McGranger).

[27] A new love interest for Mason was introduced in the form of guest character Beth Ellis (Anneliese Apps) in August 2017.

Mason urges Beth not to give up hope that she will get the transplant and they share "a heartfelt moment", which led a New Idea columnist to speculate that they could be more than just friends.

[39] Pledger later posted a photo of himself walking around the outdoor set on his social media, confirming that Mason would recover from his paralysis.

"[41] Speaking about his final scenes, Pledger called Mason "heroic" and compared his death to an intense song, explaining that there was a lot of momentum and "a bit of a crescendo moment" when he was killed.

Mason starts working at Brody's restaurant as a waiter, while he is also given a placement at the local hospital, where he clashes with his supervisor Nate Cooper.

Blaine threatens to kill the Morgans, before revealing that Justin knew that their father was working for the syndicate and that their mother sacrificed herself to save him.

The plane crashes into the desert and Mason has to treat a pregnant Billie Ashford (Tessa de Josselin), whose amniotic sac is damaged.

Mason helps Brody out at the Summer Grooves music festival, and he and Olivia kiss, before leaving to go skinny dipping.

Olivia later sets Mason up with her friend Lena Ascot (Felicity McKay), but nothing comes of it after he finds her dealing drugs at a party.

Mason gives Jennifer Dutton (Brittany Santariga) a private boxing lesson and she kisses him, but he pulls away and she makes it seem that he had made an unwelcome advance towards her as Hunter walks in.

Mason befriends Dempsey Blackwood (Sophie Don) during a singles night at Salt, but their date is interrupted by Hunter and Olivia.

For his portrayal of Mason, Pledger was nominated for Best Newcomer at the Digital Spy Reader Awards; he placed last after receiving 3% of the total vote.

[42] Jonathon Moran of The Daily Telegraph predicted that Pledger "will no doubt be a hit with the young female fans with his buff body.