BBC Casualty fans were left utterly gobsmacked this week as they caught a glimpse of Charlie Fairhead, played by Derek Thompson, taking on a fresh role following his emotional exit from the long-running medical drama earlier this year.
The veteran actor, who has become synonymous with his character in Casualty, made a surprise appearance in the Belfast-based series Blue Lights, causing quite the buzz among fans during its second episode.
Viewers couldn't help but express their shock and delight after witnessing Derek's character Robin Graham make a dramatic entrance towards the end of the episode.
One ecstatic fan took to social media to write: "When you see Charlie from Casualty in #BlueLights," adding a meme of Leonardo DiCaprio pointing excitedly from Once Upon a Time in Hollywood for effect.
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