Rattlestar Ricklactica.In order to keep Jerry from hurting himself while putting up Christmas lights Rick makes him lighter than air, and makes Jerry's shoes heavier than air to act as an anchor. However, Jerry later loses one of his shoes which causes him to float away and get lost. While traveling through space, Rick's spaceship gets a "flat tire", which requires Rick to stop to repair it. Morty disobeys Rick's order to stay in the spaceship, and is bitten by a space snake. As Rick analyzes the snake for an antidote, he and Morty learn that it is in fact an astronaut from a planet of intelligent snakes that are on the brink of a world war. Feeling guilty, Morty secretly replaces the dead snake astronaut with a regular snake and drops it off at the snake planet. The alien snakes soon realize Morty's snake is not native to their planet. Later, time-traveling robot snakes arrive at Morty's house to try to protect and kill him. With help from a future version of himself, Rick travels back in time and leaves the secrets of time travel to the snakes earlier in their timeline, which eventually results in them abusing time travel enough to attract the attention of the Time Police, who destroy their civilization by eliminating their first intelligent ancestor. Jerry manages to make his way back home but ends up injuring himself like Rick predicted. Rick and Morty then meet their future selves, who remind them they need to help their past selves solve the snake problem and close the time loop.