ALVINNN!!! and the Chipmunks 2015 Season 3 Episode 20 School Alone / It Came from Outer Space Episode Title: School Alone / It Came from Outer Space Episode Description: School Alone:When Brittany accuses Alvin of drawing unflattering doodles of Miss Smith on the blackboard and a fight ensues between the two of them, they get left behind from a field trip. On top of that, it is the school's Founder's Day, and legend has it the ghost of the school's founder and first graduate, William Storm Grockenberger, returns on Founder's Day every year to haunt the hallways of the school. When the lights go out, the doors lock, and Alvin and Brittany hear strange noises throughout the hallways, they fear that they have angered the ghost of Grockenberger, and attempt to communicate with him to make peace. It Came from Outer Space:Realizing that he forgot about the impending science project, Alvin picks up a rock he finds on the sidewalk, and decides to pass it off as a meteorite piece he claims he has discovered. Within no time, a team of government agents swarm the school and chase Alvin down, because as it turns out, the rock that he picked turns out to actually be a meteorite piece, and they want it - by any means necessary.