By Series 7, Dad's Army was definitely enjoying its own unique Indian summer. Much of the magic had been lost but the original cast was still largely in evidence and their misadventures remained refreshing enough to still amuse and entertain.
However, as has been mentioned already, the series was certainly incomplete without James Beck as Walker. Talfryn Thomas as Cheeseman seemed an odd appendage, and his introduction to the platoon was unconvincing, his integration none existent. This, of course, is not a complaint at the man himself, but he was unsuited to continual involvement.
Also, the development of Pike changed the chemistry in his relationship with Mainwaring, and although this was to be expected as he grew older, his newfound cockiness is a surprise to the Pike we came to know and love from Series 1 through 6.
A gem on the DVD is a featurette on Arthur Lowe, a very accomplished actor by all regards. It is certainly interesting to see him talk (in later life), about his role in Dad's Army and to hear the opinions, views and recollections of the surviving cast members.
Overall, I think it fair to conclude that this remains a good purchase, and not only for the hardcore Dad's Army fan. Viewers merely need to adapt to the platoon's change of circumstances and enjoy the differences in the comedy they indulged in.