S1·E4 Hot Rodding Teenagers from Dimension X
Aired December 17, 1987
Synopsis
Shredder experiments with the Inter-Dimensional Portal, hoping to contact Krangs' Rock Soldiers and prepare an invasion of Earth, but a group of fun-loving aliens called the Neutrionos, renegades in Krang's dimension, take advantage of the Portal's opening and use it to arrive on Earth.