Actors from the show appeared among workers and travellers, carrying distinctive blue balloons with the character of Mark – Adam Scott – at the front.
Zach Cherry (Dylan), Britt Lower (Helly R), Adam Scott (Mark S) and Tramell Tillman (Milchick) could all be seen smiling and waving to Londoners.
@doeyppp The Severance cast just popped at London Bridge Station! #severance #appletv #fyp #foryoupage #Milchick #adamscott #hellyr #britlower #gwendolinechristie #gemma #DichenLachman ♬ Main Titles – Theodore Shapiro
Many fans of the show were disappointed they missed the random event.
One wrote on TikTok: “We would have appreciated a notice to be able to call in sick, I mean plan annual leave to attend this.”
Someone else commented, “I should’ve gone to the office today.”
Another wrote on Reddit: “Genuinely wondering, how do people find out about these things? Probably my favourite show on TV and the entire cast just happen to appear about 20 minutes from my door on my week off, but I don’t find out until an hour afterwards.
“Genuinely wondering, how do people find out about these things? Probably my favourite show on TV and the entire cast just happen to appear about 20 minutes from my door on my week off, but I don’t find out until an hour afterwards.”
“Severance” has garnered significant praise since its debut, exploring the complex relationship between work and personal identity through a science fiction lens.
The show follows employees who undergo a surgical procedure that completely separates their work memories from their personal lives.
Severance first aired its season one in 2022, but season two was hit by the Hollywood writers’ strike, leading to a three-year gap between instalments.
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Season two finally dropped in January 2025 and became Apple TV+’s most-watched series ever.
In a statement about season three, director Ben Stiller said: “Making ‘Severance’ has been one of the most creatively exciting experiences I’ve ever been a part of.
“While I have no memory of this, I’m told making season three will be equally enjoyable, though any recollection of these future events will be forever and irrevocably wiped from my memory as well.”