Last night, the first part of the new ITV thriller Cheat aired and it’s safe to say we’re already hooked.

If you haven’t heard of it (hello, ITV hub, it’s not too late), Cheat is a four-part psychological thriller starring former Coronation Street actress Katherine Kelly as university professor, Leah, and BAFTA award-winning Molly Windsor as her student, Rose.

From the off, it’s clear that this is no normal student/teacher relationship.

The moment the credits open, we see our two protagonists either side of a prison wall and as we cut back in time, we discover Leah reprimanding Rose for cheating on an essay and subsequently revealing that Rose has an entire folder dedicated to Leah on her computer – including one of her wedding pictures.

As we see Rose becoming increasingly obsessed with her lecturer – even showing up at her house to share a glass of whisky with her husband and potentially having killed her pet cat (how is this only episode one?) – we’ve got a few theories about what might happen next…

5 theories we have after episode one of 'Cheat'