Letting Go

"Letting Go" is the 864th episode of Casualty and the 41st episode of the 27th series.

Synopsis
A young boy is clipped by a car and rushed to the ED, while a woman is brought in after falling down the stairs of a busy shopping centre. Eventually, the medics realise the patients are mother and son - but why did she leave him wandering the streets by himself? Ella is up to her old tricks again, masterminding an off-licence robbery that ends up with four youngsters in casualty - but Ash still refuses to accept his daughter is as troubled as everyone else believes.