This is the only episode to feature a mummy.
Dr. Capel Smith: (after donning the Ring of Eternity) It's wonderful. (laughs wickedly) Behold! You are now gazing at an immortal. (laughs wickedly again, but suddenly transforms into a statue of a pharaoh) What's this? I can't move. (grunts and groans until he is frozen forever as the statue)
Vanessa King, who plays Cleo, was also in the episode called The Tale Of The Fire Ghost. She played the daughter/sister in that one too.
Danny Cooksey who plays Josh gained his fame from an earlier Nickelodeon show called "Salute your Shorts" where he played Bobby Budnick.
This story was told by Tucker.
The girl's name is Cleo. This is a play on the name of an Egyptian historical figure, named Cleopatra. This was used because this episode focused on mummies, which were also common in Egypt long ago.