Mrs. Stephens, Where are You?

Serena comes by to babysit Tabitha. Darrin's mother Phyllis stops by and thinks Serena is Sam with her hair dyed. After learning who Serena is, Phyllis starts making comments about Endora and Uncle Arthur. Serena does not mind that so much, but when Phyllis calls Sam selfish with the way she treats Tabitha, Serena turns her into a cat.