1965's "War Between the Planets" (Missione Planeto Errante or The Errant Planet) was the third in director Antonio Margheriti's ambitious 'Gamma 1 Quadrilogy,' four features commissioned outside Italy and completed over a period of three months, his last return to epic science fiction since starting out with "Assignment: Outer Space" and "Battle of the Worlds" (among the authors involved were Bill Finger and Charles Sinclair, collaborators with Bob Kane on Batman). "The Wild Wild Planet" and "War of the Planets" came first, its theatrical title eventually changed to "Planet on the Prowl" to avoid being confused with its predecessor, a new cast aboard for this third entry (held over for the finale "Snow Devils"). Giacomo Rossi Stuart as Commander Ron Jackson is dispatched by orbiting space station Gamma 1 to investigate the possibility of gravitational forces responsible for a rash of tidal waves and earthquakes afflicting the earth. The script gets bogged down in personal relationships and wobbly scientific jargon, only taking flight during the final reels, when the asteroid is revealed as a gaseous planet with blowing wind, interior brain cells, and solid arteries that bleed crimson grue when cut. Costs were kept down by reusing costumes and sets, a completely antiseptic, dust free world of bright colors set around the year 2000, this plotline already worn out since George Pal's "When Worlds Collide" or even "Battle of the Worlds." Critics never had anything positive to say about these films, played dead serious by the entire cast, but the climax here does foreshadow the STAR TREK episode "The Immunity Syndrome," depicting an energy eating single celled organism that can only be destroyed by antimatter (James Doohan's Scotty beautifully exhales: "aye, it couldn't swallow that!"). Giacomo Rossi Stuart was quite a familiar face from eclectic titles like "The Day the Sky Exploded," "Caltiki the Immortal Monster," "The Last Man on Earth," "Kill Baby Kill," "The Night Evelyn Came Out of the Grave," and "Death Smiles on a Murderer."