Version 1
Oscar as Mr. Peabody
Oona as Mona Lisa
Agent Olive as Penny Peterson
Agent Otto as Sherman
Ms. O as Mrs. Grunion
Agent Otis as Mr. Peterson
Agent Olympia as Mrs. Peterson
Coach O as King Tut
Version 2
Agent Otto as Mr. Peabody
Agent Otis as Sherman
Agent Olive as Mona Lisa
Ms. O as Penny Peterson
Oscar as King Tut
Shapeshifter as Mrs. Grunion
Agent Octavia as Mrs. Peterson
Agent Ohlm as Mr. Peterson
Version 3
Agent Otis as Mr. Peabody
Agent Otto as Sherman
Oona as Penny Peterson
Ms. O as Mrs. Peterson
O'Donahue as Mr. Peterson
Dr. O as King Tut
Odd Todd as Mrs. Grunion
Agent Olympia as Mona Lisa
Version 4
Agent Otto as Mr. Peabody
Oscar as Sherman
Oona as Penny Peterson
Ms. O as Mona Lisa
Puppet Master as Mrs. Grunion
Delivery Debbie and Delivery Doug as the Pizza Lady and the Pizza Man