S1·E3 The Big Time Slipper Adventure / What Egg is This?!
Aired April 22, 1981
Synopsis
Senbei tests out his newest invention: an alarm clock-shaped time machine called the Time Slipper. On its inaugural voyage, Arale gets lost in ancient Japan. / Arale and friends use the Time Slipper to go back to the days of the dinosaurs, and find a mysterious egg.