Speaking to ITV.com, Gascoyne praised the timing of Peter and Carla's return to Weatherfield.
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The actor said: "I think it's brilliant the return of Peter and Carla, and it [comes] just at the right and stroke very wrong moment!"
The 44-year-old took a four-month break with co-star Alison King (Carla) in June.
He further teased: "Leanne obviously is most knocked back by it, but the person who really doesn't want to see him at that point is Mr Tilsley."
Gascoyne also revealed that it was his decision to grow facial hair for "a nice chilled Peter" as he wanted to "change him a bit".
Peter and Carla make their cobbles comeback at the end of tonight's 7.30pm episode, with the fallout following in the second half of the double bill at 8.30pm.
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