Baby Kate and the Imaginary Mystery

Summary
Pal and Kate fear Nadine has been kidnapped by the Tibbles, so they set out to investigate.

Trivia

 * The Xfinity description guide calls D.W. a boy while saying, "D.W's imaginary friend Nadine is missing, so his real-life pals set out to find her".

Home Video
DVD:
 * Dancing Fools (DVD)
 * Arthur: Season 11