The teachers wife Joanna has mentioned how he gets before he forms some sort of relationship with one of the pupils (always boys who have dysfunctional home life) that’s grooming he should only have a professional relationship with them
I think the teacher will end up in prison with Tommy but can’t work out why Neil is so involved unless he is just trying to get Ryan to love him as he misses his own children
I think Catherine’s love for Ryan is complex there is that hatred for Tommy and she sees Tommy in Ryan tied in with her guilt and grief I think in the end she will be tested and realise her love is unconditional