The Green Slime

A group of scientists discover that an asteroid, named Flora (which may or may not be the real asteroid 8 Flora),is on a collision course with Earth. The space program summons Commander Jack Rankin to take command of space station Gamma 3 and destroy the asteroid, stating that if he should fail to not bother coming back because the asteroid collision would cause an extinction level event.

Rankin goes to Gamma 3 where he runs into an old comrade Commander Vince Elliot of which he has a history with. Nevertheless, Rankin carries out the mission Commanding a shuttle onto the surface of Flora to set bombs to destroy it. While on the surface, they discover a strange amoeba like creature attaching to their vehicles and sucking the energy out. The science officer Dr Halversen tries to bring a sample of the green substance aboard the shuttle but Rankin angrily throws it to the ground causing it to shatter and some of the green slime to attach to Halversen's space suit.

The detonation is a success and Flora is destroyed. The crew returns to Gamma 3 to celebrate while their suits go through decontamination. The energy from decontamination causes the green slime to evolve and grow and in the middle of the celebration and alarm goes off indicating trouble in the decontamination chamber. An officer opening the door is quickly killed by an unknown assailant.

When the senior officers arrive to investigate, they find the crew member electrocuted to death and a strange one-eyed tentacled creature that discharges lethal amounts of electricity. When they attempt to kill it with their laser weapons, they find that the creature's electricity causes the blood to multiply their numbers and there are quickly more creatures. Despite the attempts to contain the creatures, they quickly multiply even more to the point where they will soon overrun the station. Dr. Halversen is killed trying to contain the creatures.

Rankin, refusing to leave until the mission is completed, stays in command and decides to evacuate the station on shuttles and set the station to burn up in Earth's atmosphere. Elliott returns to help his friend and is killed trying to save him. Rankin manages to set up the crash landing and escapes with Elliott's body onto the shuttle as the station burns up and destroys all of the green slime creatures. Rankin logs the mission success and recommends the highest citation for Vince Elliott posthumously.