Here is the official Being Human synopsis for the third episode of Series 3 entitled Type 4.

While on her regular midnight stroll Annie draws the attentions of a mouthy drunk girl, Sasha, who starts ranting at her and follows her home, as the hit drama about supernatural friends continues.With Sasha’s putrid smell and rotting face, the housemates realise she’s no ordinary human being, nor is she a ghost. She’s a zombie: not living, not dead, instead stuck in a decomposing corpse.

Sasha is in denial about her condition and sets about flirting with Mitchell, but he’s preoccupied with another person without a pulse … Annie. Mitchell suspects Annie fancies him and is afraid of what it might mean for their friendship.

He has also attracted the attentions of a super-fan, Graham, who holds him up as a hero for the Box Tunnel 20 massacre. While seeming harmless initially, Graham’s behaviour soon becomes stalker-like – and with him having so much knowledge about his idol, he could become a potential danger to the friends.

Meanwhile, George and Nina discover something potentially life-changing…

Annie is played by Lenora Crichlow, Sasha by Alexandra Roach, Mitchell by Aidan Turner, Graham by Tony Maudsley, George by Russell Tovey and Nina by Sinead Keenan.

Type 4 airs Sunday 6th February at 9pm on BBC3 and BBCHD.