Daniel Brocklebank, who plays vicar Billy Mayhew in Coronation Street, said his character is "angry but on some level relieved" about the possibility that a former flame is in Weatherfield.
Billy is currently living a settled life with partner Paul Foreman (Peter Ash) and together they are bringing up Summer Spellman (Matilda Freeman).
However, Billy is set to encounter a blast from the past when Todd Grimshaw (Bruno Langley) returns to the cobbles.
"I think he's angry, but then on some level, relieved that he’s ok. More so for Eileen for Billy’s sake because it’s her son.
"Billy wants to get to the bottom of this for Eileen as she is still away visiting Jason. Billy has moved on, he’s with Paul now and Paul has moved in and they are a little family with Summer."
"So, for Eileen’s sake Billy is relieved but still very angry at Todd for leaving them all in the way that he did, and for everything he put Summer through.
"And even now Todd is playing games, or so it seems, why send a letter, why not just come and see them," he said.
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When asked what he thinks will happen if he comes face-to-face with Todd, he said: "It's always horrible when you run into an ex, never pleasant for anyone. It’s a mixed bag of emotions and realistically he’ll want answers.
"Once they’ve established that he’s alright, Billy is going to want to know what the bloody hell has been going on!"