Al Smith’s award-winning series set in an ambulance control room.

Carrie is an ambulance call handler. She never knows what the next emergency will be or the effect it might have on her.

And sometimes you have to listen hard to find out exactly what’s going on.

Some calls are literally a matter of life or death – while for others, the emergency may be more in the mind of the caller…

Al Smith’s tense drama series goes behind the scenes of an ambulance control room.