Arthur (1996)

S11E09 Baby Kate and the Imaginary Mystery

After Nadine fails to show up for tea with Vicita's imaginary companion, Tweenie, Baby Kate and Pal start to worry. Fearing that she might have been taken by the Tibbles, they decide to investigate her disappearance. As they dig deeper into the mystery, they inadvertently involve Francine's cat, Nemo, in their quest to find Nadine.