Baby Kate and the Imaginary Mystery

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

Major

 * Kate Read
 * Pal
 * Nadine Flumberghast
 * Nemo

Minor

 * Treenie
 * Amigo
 * Timmy and Tommy Tibble
 * David Read
 * Arthur Read
 * D.W. Read
 * Mrs. Tibble
 * Uncle Wormy
 * Stanley
 * Jumbo

Cameo

 * Mrs. Tibble's stuffed animals
 * Tooth Fairy
 * Pixies
 * Rumpelstiltskin

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".
 * In the beginning of the episode, Pal breaks the fourth wall by telling Kate that the viewers don't say anything even when Arthur talks to them.

Episode Connections

 * The Om_ble backpack from "D.W.'s Backpack Mishap" is seen in this episode.
 * Mashed Peas Theater is also seen in "Invasion of the Soccer Fans".