Troy - Callum Jones's biological father - has this week returned to Australian screens, while UK fans will see him back from late June. He will remain on Ramsay Street for a few weeks.
The ex-soldier's return has been tipped to shake up life for Toadie and Sonya once again, while Jade will also struggle as her own troubled history with Troy is explored for the first time.
Brummer told TV Tonight: "It was a little bit different this time. Troy knew what he wanted and knew how to go about things, playing characters off against each other and leaving people with a smug, knowing smile which was infuriating for the other characters.
"It was good fun. More interesting than playing a goodie two-shoes nice guy."
He added: "But I think Troy's pretty much done his dash this time around. There's only so far the storyline can go. Callum is his biological son and he missed out on too much of his life to just pick up and be his dad."
Troy's Neighbours return was confirmed in March. He previously had a seven-week Erinsborough stint in mid-2011.