Father Peter Flaherty – Adrian Dunbar
Father Flaherty is Michael's friend and confidante
FELLA! Sure it's only Line of Duty's Ted Hastings. Of course, there's more to Adrian Dunbar than merely catching bent coppers (what a good job he's done there though, eh?) – you might also recognise the Irish actor from The Crying Game, My Left Foot, Ashes to Ashes or, more recently, The Hollow Crown.
Father Fitzpatrick – Tony Guilfoyle
Father Fitzpatrick is the teacher who haunts Michael's dreams
Guilfoyle is no stranger to playing a man of God. In The Crown he played the Bishop of Durham, he starred as a vicar in Decline and Fall, and - perhaps most famously - he played Father Ted's rather unfortunate friend Father Larry Duff, who always ended up having accidents thanks to the cleric's phone calls.
Mariella – Clare Calbraith
Mariella is Christina's sister - and seems to have her life in order
From SIlent Witness to DCI Banks, Clare Calbraith's enjoyed roles in many a UK TV drama. Most recently you'll have spotted her in ITV's Little Boy Blue, as well as wartime drama Home Fires. Calbraith's also popped up in Vera as DC Rebecca 'Shep' Shepherd, and she had roles in Downton Abbey, The Shadow Line and Coronation Street too.
Pauline Pickering – Naomi Radcliffe
Ms Pickering is the local primary school teacher who's helping to prepare the children for First Communion
Naomi Radcliffe is probably best known to fans of Coronation Street as Alison Webster, Kevin's ill-fated other half who walked out in front of a truck after snatching Bethany Platt following the death of her own baby. Radcliffe also appeared in hotel drama The Grand, Spotless, Shameless and Doctors. And in recent weeks she also starred in BBC's gripping three-part drama, Three Girls.