The Listener, BBC1 - possible spoilers!!

[gettingolderbutcooler]

Oh god she's irritating.
Am on Ep 3.
She's awful!! She can't possibly deny she's leading K on. 😡
Ooh I'm cross.
Kinda in love with her DH a bit though 🤣

Is it a psychosis? Is it something from the universe? And what about the Group? Simply a cult or do they know something?
Oooh!!

Just finished it.
Unsure what that final scene was meant to mean? The Mona Lisa smile?