As far as unsold tv pilots goes, The Solarnauts, from 1967, is engaging enough to make me wish it had gone to series. There is a definite Gerry Anderson vibe going on here, and, if you like bongos, you're going to love the musical score. Okay, it's definitely not Star Trek. It is, however, rare British sci-fi from the Age of Groovy, and really, isn't that enough? Did I mention the bongos?