Imagine is the 20th and last episode of Yo Gabba Gabba! from season 1. In this episode, the characters learn that using their imagination can open the world around them.
This is the second episode without Mark's Magic Pictures or Biz's Beat of the Day. The first was Summer, The Third is Dance (albeit it introduces the segement I Can Play), The Fourth is Move, and the fifth is Halloween (albiet it has an unaired BBotD segement)
This is the only episode that contains a white cloud title card instead of small portable red television title card.