I placed the episodes of Long Hot Summer on YouTube. All episodes still exist but the other 13 are unavailable anywhere. As a 20th Century Fox series it seems unlikely the complete series will ever get a DVD release.I loved The Invaders, but I would also like to someday get a complete set of Roy Thinnes' previous series, Long Hot Summer, from 1965, which lasted one full season. The series was one of the last made in B&W and was one of the first TV dramas filmed as a serial -what nowdays would be called an 'arc'- basically because it was kind of an soap opera trying to follow Peyton Place's success, although based on a William Faulkner novel. Anyway, it was very good with great acting, including the great Nancy Malone as coprotagonist just after finishing her stay in Naked City. YouTube has -or had- full versions of the only 13 (of 26) episodes that seem to have survived.
As this was made in the '60s, the show was shot 100% on film, so "uprezzing" the effects isn't necessary. The effects would be just as 'dirty' as the original effects in 1960s Star Trek, since the original elements probably no longer exist and if they did, would be, as you say, too costly to re-composite and edit back in.I think they can just uprez the effects scenes since I doubt there would be any budget to redo the effects which are very little in the show anyway.
The extended 60-minute version of Beachhead is included on season 1 disc 5 of the 2008 Paramount dvd release.The original full length pilot episode of The Invaders has not been released on DVD, Would it not be a good idea to release this version of the pilot with extras on bluray to test its popularity prior to a possible full bluray release? It would also be good to have a book about the series like the Marc Cushman books on Lost in Space.