It’s been 15 years since Casualty fans last saw Martin ‘Ash’ Ashford, but this week the former nurse (played by Patrick Robinson) returns to the hospital as a fully qualified doctor!

Charlie is delighted to see his old pal, but Clinical Lead Zoe is unimpressed when her new locum turns up late for his first shift. However, he has a very good reason for being tardy… he stopped to help at a motorbike crash!

Elsewhere, Clinical Nurse Manager Tess has stern words with Fletch when he allows the lines of professionalism to become blurred with student nurse Aoife.

Aoife has an emotional day when her cocky ex-fiancé Craig turns up at the emergency department, having travelled from Ireland especially to win her back.

When Tess (Suzanne Packer) overhears Fletch giving his trainee relationship advice she warns him Aoife has developed feelings for him. Fletch (Alex Walkinshaw) laughs it off, insisting he’s simply a father figure to the pretty, young nurse.

Also this week, Tom reveals a personal secret to Sam about his upbringing. He tells her he was adopted as a child but has no interest in knowing who his biological parents were.

Towards the end of the shift, an ill Zoe reluctantly goes home with flu. She’s forced to leave the ED in the hands of new locum doctor Ash, despite thinking that he is cocky and untrustworthy!