Come In, Captain Kirk
Captain Kirk beams down to an unknown lanet with an exploratory force. When the starship loses contact, Mr. Spock orders a search. He beams down and finds Captain Kirk held by a mysterious magnetic force. Spock returns to the Enterprise and the crew computerize an opposing force which can be used via phaser. With this force at his command, Spock returns to the strange planet and frees Captain Kirk and his men.