Casualty fans are seriously worried for Cal Knight

– and for good reason it seems as the popular

character is set to get into a violent fight with Scott

Ellisson, with potentially deadly consequences.

In a highly charged episode of the medical drama, it’s all hands on deck to save the life of Lily Chao, who was knocked down by Gemma in the previous episode.

But with Casualty previously having teased a main character death, viewers’ fears are now elsewhere as images of Cal clashing with Scott have led to speculation that it will be his life on the line.

With tragedy looming over the ED, is this the end of him – just as he and Ethan are starting to build bridges following their fallout over Alicia?When bigoted Roy dies on the wards, a vengeful Scott is looking for someone to blame – and he is convinced that the strike held by the doctors is to blame for what happened. With Denise giving a damning report to a journalist about the strike, Scott wants to take more direct – and brutal – action and arms himself with a knife.