A scientist named Dr. C and her assistant Mike travel to the Arctic to study artifacts and find a frozen woolly mammoth named Phil. They thaw him out and are surprised to find that he can speak. Whenever a situation in modern times involves physics principles, Phil remembers when a similar event occurred long ago in the prehistoric valley of Woollyville with his fellow mammoths and his Cro-Magnon friend Cro, who lived with a family of Neanderthals. Each episode features Phil narrating how a problem was resolved through simple engineering.

The show's (and lead character's) name is an Occitan word for "cave"; it alludes to Cro-Magnon, the location in France where the earliest anatomically modern humans were first discovered.

Modern-day characters edit

• Phil (voiced by Jim Cummings) is a smart but goofy woolly mammoth with orange and reddish fur who is kind to humans and mammoths alike. During the end of the Ice Age, Phil fell into a glacier while saving Cro from Selene and was thawed out by Mike and Dr. C 45,000 years later. He narrates stories of his life in Woollyville in every episode.
• Dr. Cecilia (voiced by April Ortiz) is an eccentric female scientist. She and Mike thawed out Phil, so he tells them his stories. Dr. C speaks with a distinct Hispanic accent and speaks a few Spanish words in some episodes. She bears a resemblance to Cro and may in fact be his descendant.
• Mike (voiced by Jussie Smollett) is a young friend of Dr. C who wears big glasses. He likes to play basketball and lives with Dr. C for reasons not specified. He and Dr. C were the two people that thawed out Phil and therefore, he tells them his stories.

Cavepeople edit

• Cro (voiced by Max Casella) is an 11-year-old Cro-Magnon boy who was adopted by a tribe of Neanderthals. He is a somewhat scrawny and yet still rather muscular young Cro-Magnon boy with long, shaggy, red hair and wears a yellow armband on one arm. Most of the Neanderthals that he lives with are jealous of his intelligence. Unlike the rest of the tribe, Cro speaks in complete sentences.
• Ogg (voiced by Jim Cummings) is the selfish, bossy leader of Cro's adoptive Neanderthal tribe. He is difficult to get along with but easily frightened by danger.
• Gogg (voiced by Frank Welker) is a tall but sensitive Neanderthal who sticks up for Bobb and mostly translates for him, even though Nandy and Ogg do occasionally.
• Bobb (voiced by Frank Welker) is another adopted member of the Neanderthal tribe and the least evolved of the tribe, resembling a homo habilis. He does not speak like the rest of the Neanderthals, but makes gorilla-like noises which Gogg usually translates. When Bobb was younger, he was in a different tribe made up of similar homo habilis. The tribe took a nap and Bobb woke up to find the whole tribe had vanished without a trace, creating a fear of loneliness until the Neanderthals found him.
• Nandy (voiced by Ruth Buzzi) is the matriarch of the Neanderthal tribe who is noted for her urban legends. Some of her legends include the legend of "Big Thing" and a monster called "Big Skinny Thing with Many, Many Legs." She gets into arguments with Ogg and usually wins as she is fully aware of Ogg's own fears. Nandy is very overprotective of Cro and motherly around everyone else.
• Sooli (voiced by Cree Summer) is another Cro-Magnon who got separated from her tribe and Cro and Pakka help her find her favorite horse. Sooli only appeared in one episode.

Woolly mammoths edit

• Ivanna (voiced by Laurie O'Brien) is a southern belle woolly mammoth with yellow fur and brown skin with a mole who is Phil's love interest. She is the second oldest female mammoth in Phil's herd next to Esmeralda. She usually uses Phil for her experiments.
• Pakka (voiced by Candi Milo) is a young woolly mammoth with light orange fur and yellow skin and a close friend of Cro's. She and Cro meet after Cro confronts Selene the Smilodon. She is the third oldest female mammoth next to Ivanna and Esmeralda. She sometimes tells Cro interesting facts about mammoths.
• Steamer (voiced by Charlie Adler) is the youngest woolly mammoth in Phil's herd with maroon fur and light purple skin, whose hyperactivity and love of making mischief often land him in hot water.
• Esmeralda (voiced by Tress MacNeille) is the oldest female woolly mammoth and matriarch of Phil's herd with light yellow fur and gray skin. She makes sure that everything goes to order and that those who have wronged the mammoth society be punished. She has strongly mixed feelings about the presence of Cro's tribe in Woollyville.
• Earle (voiced by Frank Welker) is an elderly woolly mammoth with gray fur with dark gray-blue skin and a bald spot due to not having longer fur on his head. He hates humans and prefer traditions over new ways of life.
• Mojo (voiced by Charlie Adler) is a woolly mammoth who is Earle's younger brother with gray fur and light gray skin. Like Earle, Mojo hates humans and prefer traditions over new ways of life.

Villains edit

• Big Red (voiced by Charlie Adler) is the conniving leader of a menacing pack of bumbling dire wolves. He uses threats to scare his minions into doing a good job. The wolves are one of two antagonists on the show as they would often try to eat Cro's tribe or the younger woolly mammoths.
  • Murray (voiced by Jim Cummings) is the minions of Big Red. Because he threatens them, the dire wolves fear him. Murray thinks stupid things, which Big Red doesn't like, as shown in Things That Eat Mung in the Night.^[5]
• Selene (voiced by Jane Singer) is a villainous, purple, yellow-eyed Smilodon. She first appears in "Lever in a Million Years" and has a monstrous appetite for anything that moves, including the cavepeople. According to the show's opening theme song, she and Phil were fighting on a cliff and fell when part of the cliff gave way. She landed on a lower cliff, while Phil fell into a glacier and was frozen in suspended animation for thousands of years.

According to Sesame Workshop's website, 21 episodes were made for the series.^[6]

Season 1 (1993) edit

Season 2 (1994) edit

Cro debuted on September 18, 1993, on ABC. Even though the show received high ratings and drew the largest audience in its time slot,^[8] ABC cancelled the series after two seasons. The last episode premiered on December 3, 1994. In response to the cancellation, the Children's Television Workshop started planning its own TV channel where it could air Cro as well as other shows from its library. The CTW's senior Vice President, Gary Knell, said that "the lesson for us was that we can't rely entirely on other channels to put on programs which are educational as well as entertaining."^[1] The new channel was eventually named Noggin, and it launched as a joint venture with MTV Networks (the owners of Nickelodeon) in February 1999. Reruns of Cro were a mainstay on Noggin's schedule.^[9]

From 1999 until April 2002, Cro aired during the daytime on Noggin. From April 2002 until January 2004, the show only aired during Noggin's early-morning hours, during time slots reserved for Cable in the Classroom. Nickelodeon itself also aired Cro during a block called "Noggin on Nick" from 2000 to 2002.^[2]

Three VHS tapes were released by Republic Home Video in the United States:^[10]

• Have Mammoths, Will Travel – Episodes: "No Way Up" and "Escape from Mung Island"
• Adventures in Woollyville – Episodes: "Pulley to You" and "A Bridge Too Short"
• It's a Woolly, Woolly World – Episodes: "Lever in a Million Years" and "Play It Again, Cro...NOT!"

• Cro at IMDb  
• Cro on Noggin.com (archive)