shooting paint instead of explosives from tanks

Dr. Fred Steele (Umberto Orsini) and Eve Barnett (Maya Brent) work together at an astronomical station on a bucolic island. The station's scientists learn they must deal with a rogue planet -- "The Outsider" -- that has entered the solar system. which must be controlled by an alien intelligence… Professor Benson's(Claude Rains) expedition discovers a race of humanoid creatures dead...