Actor Lennie James discusses his new Sky 1 show at the Apple Store, Regent Street in London. Critical follows a team of highly skilled doctors and nurses as they fight to save patients during the most life-threatening hour of their treatment.

Actor Lennie James discusses his new Sky 1 show at the Apple Store, Regent Street in London. Critical follows a team of highly skilled doctors and nurses as they fight to save patients during the most life-threatening hour of their treatment.