Tonight’s episode of Casualty isn’t just packed with high-stakes rescues and emotional fallout — it also features a brilliant lineup of guest stars, headlined by the arrival of Ashley Sullivan, played by Boiling Point’s Hannah Traylen.

After Teddy’s heartbreak following his relationship with Jodie, viewers have been waiting to see whether he would ever let anyone in again. Tonight answers that question with the debut of Ashley — and the chemistry is instant.

Meet Ashley Sullivan — and the actress behind her

Hannah Traylen steps into the role of Ashley, a sharp, cool-headed police officer who crosses paths with Teddy during the dramatic school roof collapse rescue.

If Ashley looks familiar, it’s because Hannah is everywhere right now. Her credits include:

• Boiling Point

• Unforgotten

• Call the Midwife

• Ridley Road

• The Responder

• Beyond Paradise

It’s a strong résumé, and the confidence shows. Ashley isn’t just a one-off background character — she arrives with agency, spark, and just enough intrigue to turn Teddy’s world sideways.

After working side-by-side to save young Oscar from the rubble, Ashley wastes no time asking Teddy out for a drink — and to the delight of fans, he eventually says yes.

Could Ashley be the fresh start Teddy needs? If sparks keep flying, the answer might be yes.

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The child star stealing scenes: Benjamin Chivers as Oscar Whittle

Tonight also features a young breakout performance from Benjamin Chivers, playing Oscar, whose life hangs in the balance until newcomer Kim steps up to save him.

At just 13, Benjamin has already built an impressive career as:

• Isaac in The Devil’s Hour (Amazon Prime)

• Guest star on Doctor Who

• Actor in Guy Ritchie’s Fountain of Youth (Apple TV+)

• Actor in Napoleon

It’s clear Casualty continues to attract the next generation of screen talent.

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Supporting stars round out the Whittle storyline

Playing Oscar’s worried mother Vanessa Whittle is Isla Jackson-Ritchie, whose stacked TV credits include:

• Topboy

• Call the Midwife

• Humans

• The Girl and the Moon

Together, Isla and Benjamin deliver the emotional stakes that make tonight’s storyline hit hard.

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The students and the teacher at the centre of the collapse

Two young performers also drive the school subplot:

• Dino Luca as Freddie Sumner (known for Titanic Sinks Tonight, Afterparty)

• Harvey Weedon as Xavier Goodal (seen in Yonderland, The Alienist, Turn Up Charlie)

Their characters’ friendship adds heart to the chaos, grounding the tragedy in something relatable: kids caught in a nightmare.

Meanwhile, veteran stage and screen actor Matthew Lloyd Davies (Dracula, The Importance of Being Earnest) plays teacher Bryan Rawlins, who finds himself under scrutiny when Faith discovers he’s carrying a student’s passport and plane ticket.

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A familiar face plays Oscar’s father

Rounding out the guest cast is Tom Padley as Carl Henson, stepping in as a frantic father desperate for answers. Viewers may recognise Tom from:

• Showtrial (Series 2)

• Blitz (Apple TV+)

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A lineup with chemistry — and long-term potential

Tonight’s Casualty doesn’t just rely on the regulars — it brings in actors with energy and presence, each enhancing the episode in a different way. But the biggest takeaway for fans is this:

Teddy finally looks ready to move on — and Ashley could be the one who helps him get there.

Whether Ashley returns remains to be seen, but one thing is clear: Casualty knows how to cast future stars, and tonight’s roster proves it.