A wheezing grinding sound fades away as we close in on Christopher Eccleston wandering around in a moptop on the set of "A Hard Day's Night".     Perhaps it is the plot for a lost episode of "Doctor Who", but it is also early on in the telefilm "Lennon Naked".     Jon and I review the film, compare the reenacted scenes to their real-life counterparts (surprise!    It's pretty good, for the most part), continuing on from last week's look the theatrical "Nowhere Boy".