Aside from the fact this is the first time the series is in colour, series 3 is really where the Dad's Army we know and love gets going.
The earlier series, especially series 1 had a more of a serious tone and the actors and writers were still getting used to how the individual characters should be portrayed.
Series 3 episode 1 marks the first appearance of Jones' Van, Chief Warden Hodges having a larger role, a brief introduction to Frank Williams as the vicar and even Mrs Fox.
It's nice to see Jones at work in his Butchers shop and we even see the only appearance of his assistant Raymond. As a side note I only hope that the corned beef that was mixed and wrapped with the other meat was also raw, if not, thank goodness food safety has come along way.
The scene with Jones and Walker in the cold room is very good as are the drills with the van. The show has the right balance of physical comedy and witty dialogue. It's great to also see poor old Mr Blewitt getting mishandled at the end too.
Fantastic.