 During an episode of "The Adventures of Captain Proton" on the holodeck in a recurring Voyager hologram program in the style of vintage movie serials such as "Flash Gordon and Buck Rogers", Ensigns Tom Paris and Harry Kim are forced to leave the program running when spatial distortions trap the ship and disrupt their control over the computer.While the command staff of "Voyager" seek to discover a way to free the ship from the spatial distortions, extra-dimensional aliens who exist in a photonic state cross over from their own dimension through a distortion located in the holodeck.There, they are detected and attacked by Dr. Chaotica, who believes them to be from the fifth dimension, and whose holographic (photonic) weaponry — though harmless to humans — is deadly to the aliens.