Speaking to Huff Post UK, Tanya Franks, who plays Rainie, reveals that viewers can’t discount Ian just yet.
“Now there’s a question - I mean can Ian be ruled out? I have no idea,” she tells us. “I’m not sure that anybody could be ruled out.
“At the moment, as far as we know, Rainie and Ian were together that night, but that’s as much as we know.
“I don’t know where he was before or after,” she continues. “Rainie didn’t even know at the time that Lucy was murdered.”
So who does Tanya think killed Lucy? Well, that’s a rather difficult question…
“There really are a number of people that it could be and I could not lay that claim,” she laughs. “I would make a serious mistake [if I did] and to be honest, I really don’t have any idea.”
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Tanya Franks has returned as the troublesome Rainie
In the coming months, Rainie is set to make herself at home in Albert Square and it seems she might not be able to clean up her act.
“I think she’s certainly tried in the past and has succeeded at times,” Tanya tells us. “But whether she can sustain it is a different thing.
She’s always close to her demons so I think even if she does clean up for a while, they [will] still hang over her head.
“I think she has a lot to address - let’s put it that way!”
Julie Goodyear's already returned four times since leaving the soap back in 1966. Surely one more 'Corrie' comeback wouldn't hurt? (credit:Phil Noble/PA Archive/Press Association Images)
Brenden Brady, 'Hollyoaks'(02 of13)
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Brenden was last seen being escorted to prison after confessing to multiple murders... Well, he has to come out of prison at some point, right? (credit:Ben A. Pruchnie via Getty Images)
Becky McDonald, 'Coronation Street'(03 of13)
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Becky, played by Katherine Kelly, finally got her happy ending but we'd love to see her causing problems again on 'Coronation Street'. (credit:Eamonn and James Clarke/Eamonn and James Clarke)
Mandy Dingle, 'Emmerdale'(04 of13)
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Lisa Riley's character was one of the original Dingle clan and she'd definitely shake things up significantly by arriving back in the Dales again. (credit:Michael Walter/PA Archive)
Tina McIntyre, 'Coronation Street'(05 of13)
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We know Michelle Keegan only made her 'Corrie' exit in early 2014, but it'd be great to see her back, wouldn't it?Oh and yes, her character also died, but we're sure the writers could get creative and make it happen somehow... (credit:ITV)
Kim Tate, 'Emmerdale' (06 of13)
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Kim fled the Dales halfway through her own trial in 1999 and we wish she'd come back and cause some more trouble. (credit:PA/PA Archive)
Harold Bishop, 'Neighbours'(07 of13)
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The much-loved shopkeeper would always be welcome back on Ramsey Street - even though 'Neighbours' boss Susan Bower said she thinks his character should have been killed off after his dramatic cancer storyline. (credit:Anthony Devlin/PA Wire)
Justin Burton, 'Hollyoaks' (08 of13)
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Long before his 'Corrie' days, Chris Fountain starred as fans' favourite Justin in 'Hollyoaks'.Justin made his grand exit in 2009 when he left with Russ Owen. (credit:Gareth Cattermole via Getty Images)
Janice Battersby, 'Coronation Street'(09 of13)
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Vicky Entwistle played Janice for 14 years before leaving in 2011 and the Underworld factory hasn't been the same since. (credit:Eamonn Clarke/allaction.co.uk /Eamonn and James Clarke)
Charlene Robinson, 'Neighbours'(10 of13)
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It's been a long time since Kylie last appeared on the Aussie soap (26 years to be precise) and rumour has it, she could be making a comeback for the anniversary edition of 'Neighbours'... (credit:All Action/EMPICS Entertainment)
Scott Robinson, 'Neighbours(11 of13)
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...Of course, it wouldn't be right if Kylie went back without Jason though, would it?! (credit:PA/PA Archive/Press Association Images)
Chrissie Watts, 'EastEnders' (12 of13)
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Chrissie finally killed off Dirty Den after his reappearance in the Square, after being presumed dead for years. She's now in jail for the murder, but we'd love to see the look on Sharon's face if she made her way back to Walford. (credit:Ian West/PA Archive)
Sam Mitchell, 'EastEnders'(13 of13)
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The rest of the Mitchell clan are set for a reunion, and it just wouldn't be right without Peggy Mitchell's daughter would it? (credit:Ian West/PA Archive)