The team attend a major road traffic collision where Stuart takes the radical decision to give an open-heart massage to jump-start a woman's heart.
Back at A&E the lads feel the effects of the shock and adrenaline and are forced to see the hospital counsellor.
Attractive new counsellor Kirsty, played by Morven Christie, advises them that they'll start out feeling fairly euphoric, may grow restless, but ultimately become depressed.
Stuart gives his own take on this, and then pledges to control his predicted mood swings, but will he succeed?
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