This article covers a real-world subject which should not be taken as part of the Holby universe.

"Walk Before You Run" is the 525th episode of Casualty and the 31st episode of the 20th series.


Nina uses her Army training to rescue a marathon runner trapped in a bog, prompting the frustrated technician to set her sights on becoming a paramedic. A first-aider at the race asks Comfort out on a date. Ellen receives further bad news and Selena grows uncomfortable under Nathan's watchful eye.

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