This motion picture is interesting to watch, if for no other reason, then for analysis. It purports to have taken upon itself a complicated history. One fact is known, that of the original release date in Italy of 1966, although a website or two will show 1965. What happened since then is anyones guess. Yes, there was a 1977 release in the United States under the Monarch Releasing Corporation. The titles, "Star Pilot" and "Star Pilots" are given. Yet in the video release by Sinister Cinema the title is shown as "2 + 5: Mission Hydra" although the Monarch Releasing Corporation credit is also listed seemingly indicating this is the same version as the 1977 US dubbed release. The real confusion starts with the footage from other movies spliced in at some points. Another website claims the movies "Kaiju Daisenso(1965)" and "Yusei Gorasu(1962)" are interwoven with the plot. This may very well be, but Casey Kasem is also clearly seen. This would appear to be from "The Doomsday Machine" which had a checkered history of its own, being made in 1967(a year after "2+5"), but released in 1972. So therefore this footage must have been added only in the US release, though "2+5" premiered in West Germany in 1967. Various running times(84, 89, 90 + 92) are given as well depending on what source you refer to. The bottom line on this former late night favorite is, for the male viewers there is Leontine May(who dominates) and for the female viewers, Kirk Morris(pseudonym of Adriano Bellini) and Gordon Mitchell. It should also be mentioned for the classical music crowd, that although the credit is given on the IMDb for "theme from Toccato & Fugue in D Minor by JS Bach", it is not mentioned that it is under the direction of Leopold Stokowsky.