Neighbours hints at a darker side to Shaun Watkins next week as Mark Brennan becomes determined to investigate him.
Just as Shaun (Brad Moller) starts to spend more time with Elly Conway, a suspicious Mark investigates the possibility that he's hiding a huge secret.
Upcoming episodes see parents-to-be Shaun and Elly (Jodi Anasta) start warming to each other after a difficult few weeks. Elly even invites Shaun to join her at their baby's 12-week scan, despite previously begging him not to be involved.
When Mark (Scott McGregor) sees Elly spending time with Shaun he can't help feeling hurt, even though he has made the decision to cut all ties with his estranged wife.
Taking action, Mark decides to investigate the possibility that Shaun was connected to the mysterious fire that conveniently destroyed the police's evidence against Finn Kelly.
Mark's mood seems vengeful as he becomes fixated on the idea, much to the concern of his brother Aaron.
Aaron feels that Mark is becoming too invested in the case and gives him some tough love, reminding him that he has previously been kicked off the police force for letting his personal feelings influence his work.
Mark knows that Aaron is right, but will it be enough to convince him to drop his suspicions over Shaun?
Neighbours airs these scenes on Thursday, June 6 at 1.45pm and 5.30pm on Channel 5 (UK) and 6.30pm on 10 Peach (Australia).
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