Love this thread ... here are my odds on favourites
Grundy sibling feuds (yawn surely no more of these) - Will and Ed shout at each other a bit over a half-plucked turkey. Nic steps in as the voice of reason, dies from a freak accident when turkey giblets hurled in the heat of the moment startle Bartleby into stampeding
Pargiter family crisis - Nigel and Lizzie have a bit of a tiff about schools as Nigel cannot admit Freddie is just like him (nice but dim). Nigel gets sick of Jill poking her beak in, runs her over in the car whilst wearing Titcombe's hat as disguise. Titcombe sent down in miscarriage of justice (invokes his right to remain silent throughout).
Kate and Phoebe - continue world's most boring and awkward Skype conversations, whole of Archers listenership dies of boredom
Helen and Tony - Tony reaches breaking point, is found roaming the village rending his clothes and clutching the baby mobile, playing the tune over and over again whilst sobbing "I don't know what to do" with a touching catch in his voice. Drowns himself in village pond. Helen just continues being evil and mad (because they can't make something awful happen to the baby can they? really hope not.)
Kathy and Jamie. Kathy suggests a "fun night in" or a "fun night out", "just the two of" them, once too often. Jamie offs her with Brian's shotgun and no-one notices, let alone cares.
Ruiarh - gets fed up of a)being ignored by everyone and b) having the most ridiculous accent about 3 years after his mother died and runs away. No one notices, let alone cares.
David Archer - goes to confront the hay thief who turns out to be cowman Sam wreaking revenge by introducing a fungal disease into their crops before running off to America with Pip.