This was one of several episodes intended as pilots for spin-off series that were never made.
One of several episodes where Angela Lansbury's role is relegated to a narrator in order to alleviate her workload.
The title is a parody of the Mother Goose nursery rhyme of "Jack and Jill". "Jack and Jill went up the hill to fetch a pail of water. Jack fell down and broke his crown and Jill came tumbling after."