Of course in a pilot film, you have a higher budget typically that can help foster that illusion which isn't going to be possible to maintain in a regular series. The pilot film for "Ellery Queen" had a big enough budget to allow for two scenes of location shooting in NY that wasn't possible...
And one key difference in the Charlie's Angels pilot as opposed to the series was the presence of David Ogden Stiers in a role that the powers that be felt was unncessary (especially since David Doyle's Bosley was also already present). The future of MASH would have been impacted if they'd...
We also can't forget "Night Gallery" which was a two hour movie that aired two years I think before it made it on the air as a series. That too is in the DVD set.
"The Love Boat" had three different "pilots" of a sort in that there were three TV-movies the year before the series began. The first one had none of the future series cast members, the second one had Bernie Koppel and Fred Grandy I think, but only the third one "The New Love Boat" had the...