Cathy and Colin throw a birthday bash for Colin's father, Willie, played by guest star Maurice Roeves.
The neighbours are invited round to enjoy a spread of posh shop-bought nibbles but, despite Cathy's big show of being the ultimate hostess, long-suffering Beth has to step in and rescue the party.
Birthday boy Willie isn't impressed by any of it but finally gets into the party spirit when Colin presents him with his old accordion and he gets everyone in the mood for a living room ceilidh.
Meanwhile Ian and Jaz have their offer on a flat knocked back - but Eric steps in to help out. A missed call from the estate agent leaves them hanging.
As the party wraps up, Colin wants his dad to stay the night, but he'll have to convince Cathy it won't mean more work for her.