Brummer revealed that his turn in Underbelly: A Tale of Two Cities caught the attention of the Neighbours producers and they later offered him the role of Troy.

Before his arrival on screen, it was revealed Troy was Sonya Mitchell's (Eve Morey) ex-boyfriend and the biological father of Callum Jones (Morgan Baker).

On 1 March 2011, a writer for Channel 5's Neighbours website announced Brummer had been cast in the role of Captain Troy Miller.

[2] Inside Soap's Jason Herbison revealed Brummer's appearance in Underbelly: A Tale of Two Cities attracted the attentions of the Neighbours producers and they later offered him the role of Troy.

[3] Brummer added his Neighbours role allowed him the opportunity to work alongside his friend, Scott Major (Lucas Fitzgerald).

[4] Of Brummer's casting, the show's executive producer Susan Bower commented "We are delighted that Dieter is joining us and we're very excited about the character he is playing.

[6] Speaking to a Channel 5 website reporter, the actor said Troy stands up for himself, though "he will turn like a cut snake if he's crossed.

[1] Brummer told a TV Week reporter that Troy does not intentionally set out to stir up trouble, but aspects of his personality would cause problems.

[8] Speaking about his second stint in Neighbours, Brummer revealed that Troy is "a great strategist", who knows how to push people to his advantage.

[10] Troy subsequently learns he is Callum's biological father and Toadie begins to see him as a threat, which Brummer thought was to be expected.

[10] Moloney told an Inside Soap writer that "in a way Toadie paved the way for Troy to come back into Sonya's life - and it looks like he's going to regret that.

Troy initially takes the news well, but after running into Sonya's sister, Jade (Gemma Pranita), who provokes him with some "choice words", he snaps.

[14] TV Week's Jackie Brygel and Gavin Scott wrote that it soon becomes clear Troy is still angry, when he refuses to let Sonya leave.

[16][17] Daniel Kilkelly of Digital Spy confirmed the actor was already back on set filming, but details of his comeback storyline were being kept under wraps.

[16] Speaking to Seanna Cronin of the Sunshine Coast Daily about his return, Brummer revealed "I did the seven-week guestie last year and there was talk about it.

[16] Brummer revealed that Troy comes back to be a part of Callum's life, but the way he goes about it does not sit well with some of the residents of Ramsay Street.

[19] Brummer explained to an Inside Soap journalist that Troy insists he is a changed man as he has been through anger management and plans to turn his life around.

[19] The actor added Sonya and Toadie are "left in no doubt about his determination" when they discover he has hired their friend Ajay Kapoor (Sachin Joab) to represent him.

[19] Andrew Mercado of TV Week observed Sonya, Toadie and Callum were not the only characters reeling from the news that Troy is back – with Jade also seemingly horrified at his return.

[20] In "an explosive development", it was revealed Troy was Jade's abusive ex-boyfriend who she had mentioned in past discussions with her partner, Kyle Canning (Chris Milligan).

[21] Morey told TV Week's Jackie Brygel and Gavin Scott "Sonya sees Troy as the devil incarnate - a man who has only ever wanted harmful things to happen to her.

[7] The TV Week reporter wrote that "Neighbours takes a leaf out of Desperate Housewives' book" when a twist leaves one character severely injured.

[7] Brummer later told Mercado that things would take a shocking turn in the storyline, which leads to Troy's departure from the soap.

He asks Kate Ramsay (Ashleigh Brewer) if she knows where to find him and they are overheard by Harold Bishop, who takes Troy's phone number to give to Toadie.

[23] The Sunday Mercury's Roz Laws questioned if Troy was the right man for Sonya, adding "Not if his nasty behaviour at Harold's stag party is anyting to go by.

[27] Seanna Cronin of the Sunshine Coast Daily wrote "After daring to rough up Ramsay Street icon Harold Bishop before fleeing town last year, it's doubtful Miller will be able to win over Erinsborough's residents this time around.

[15] Morgan added "And if you ask us, Troy's still in love with Sonya, so we wouldn't put it past him to have some trick up his sleeve to split her and Toadie up for good.

"[15] Morgan's colleague Claire Crick later stated "Neighbours' Troy Miller has all the elements a proper soap baddie needs, but today he stooped to a new low when he revealed that not only did he once turn heavy-handed with Jade, but worse still – he seems almost proud of it!

"[28] Dianne Butler, writing for News.com.au, said "It's hard to completely dislike Troy despite the plague he's delivered on Ramsay St - not when he almost knocks Paul Robinson off his stool just for trying to get all alpha male on him.

"[29] Butler agreed with Jade when she told Troy that he was not going to be hanging around much longer, saying "Neighbours can't have Dieter Brummer in it, under-emoting while those hysterical teens scream at him.