Calvin is an 8 year old boy and is the son of Larry's ex-wife, Leslie. He appeared in the Season Two episode, "Prehistoric Ice Man".


After Larry escapes from Dr. Mephesto's lab, he seeks out his wife, Leslie. When he meets her, he learns that she had a new life with another man and the two have two kids together, Buck Jr. and Calvin.


Calvin wears black shoes, dark blue pants, and a maroon jacket. He also wears dark blue gloves and has red hair.