After a solid 2 series, Two Doors Down faces the common comedy trap of trying to work out who the characters really are and keep them on track or develop them more. Like the Royle Family, Scot Squad etc the characters have their own charms and the producers become aware of what the audience like about them and then commit the crime of exaggerating the characters perceived funny aspects and taking them too far. Originally they could be real people, then in the end they become extreme caricatures of the character they originally were and the show dies becoming too farcical.
Most of the episodes were good, the series finale with Grado appearing was good but the final scene with Cathy taking a mini digger to demolish a porch out of jealousy was lame. I liked it, but worry that this may be the last good series before a 4th season comes with highly implausible scenarios. Definately watch series 1 and 2, 3 is good but feel they are running out of rational excuses to get all the characters together to make a show up and if they get a 4th it'll be interesting to see if they can keep it on track.