Guest Stars Shaun Dooley as Greg Matt Stokoe as Alex Gillian Saker as Nadine Eve Ponsonby as Sarah Sandy McDade as Sister Catherine Sam Battersea as Sister Elizabeth Jonny Cheetham as First Horseman of Apocalypse Glen Coe as Second Horseman of Apocalypse Jordan Lunn as Fourth Horseman of Apocalypse Paul Brown as Third Horseman of Apocalypse