[Calvin Locke]

I think I saw "'Allo 'Allo" a couple of times. Never got in to it for any number of reasons. I was in my twenties, working at a startup, etc.

[Army Air Corps]

Well, it is a series with a sizeable story arc, so you pretty much have to watch it from the first episode rather then “hop in” later in the series. Otherwise, you miss a good deal of the foundation for some of the ongoing gags.