It's a silly program
So I'm only 3 episodes into season 1 and as a weekly episodic filler it's OK. But there is clearly is an underlying story involving a past failure, the trainee and, I suspect, a probably charismatic cult leader etc etc - yawn.
Frankly I'd quite happily ditch the Sarah Greene subplot, give more screen time to Nazneen Contractor and Emma de Caunes and roll on without this almost compulsory, totally tension and interest free series spanning story arc.
But I see the Ransom has already reached season 3 so I guess this is an utterly pointless post other than to start a thread I can return to when the subplot gets so irritating I just give up on the series.