Until Kim Tyler's death on February 10, 2021, this show had the distinction of being the oldest TV series whose entire main cast was still living.
One of the children had seen "Lad: A Dog" (1962) and named their sheepdog "Ladadog."
The family pet was a large sheepdog, which had the unusual name of Ladadog.
The sets used as the interior of the Nash family home in this series also appeared as Maurice Evans' mansion in the "Bridge of Lions" episode of TV's The Man from U.N.C.L.E. (1964)