Caillou is Captain Jean-Luc Picard
- At some point, he will be sent into the future, where he is adopted, and becomes fascinated with space. He joins Starfleet and the rest is history.
Alternatively, Jean-Luc Picard is a descendant of Caillou.
- Both are French, and bald. Enough said.
Caillou grows up to be Professor Xavier.
- Through some quirk of fate, he develops psychic powers, ends up in America, and the rest is history.
Alternatively he is a failed clone of Professor X.
- The cloning process managed to get the bald part right, but no powers manifested.
Caillou is Lex Luthor's Son.
- Caillou's mother slept with Lex, then became pregnant. She didn't know who the the actual father was because she was also with the man she thinks is his father. Lex is either unaware or simply has no interest in his son. If it's the latter...can you blame him?
Caillou soon grows up to be Saitama
Caillou is Supreme Leader Snoke
They're both bald, and Caillou's behavior could easily have led him to the Dark Side. It's possible that the cancer and treatment resulted in the disfigurements Snoke has a la Deadpool. Caillous is Judge Holden
Bald, precocious sociopaths. Caillou is dying of cancer.
This is a well-known theory on the internet, propagated by a creepypasta that can be read here
. Basically, Caillou has terminal cancer, and is bald because of chemotherapy, and his parents let him get away with pretty much anything because he's not going to live long. The episodes are being narrated by his grandmother after he's died, to his younger sister who doesn't have much memory of him.- Jossed. Word of God is that Caillou is bald because he is 2 years old in some of the books, unlike the TV series where he's fournote ; adding hair to the character made him unrecognizable, so it was decided that Caillou would never have hair.
Caillou is Casper the Friendly Ghost before he died.
Calliou died, and after death became a ghost, however much like Jack Frost in Rise of the Guardians , he lost his memory of who he was before. He was given the name Casper, and now travels the world looking for friends.- So does that mean he'll get his memories back if he finds his teeth?
The narrator in the early seasons is an older Rosie.
- At the beginning of most, if not all, early season episodes, a red-haired grandmother narrator would tell the story of the episodes to two children. This theory would explain how the grandmother knew everything Caillou did.
Rosie wrote all the Caillou books that appears as the framing device in the shorts
Tying the Caillou dying of cancer and The narrator in the early seasons is an older Rosie WMG together. While Caillou and Rosie do have their moments, they truly do love each other. When Caillou eventually succumbed, Rosie decided to keep Caillou's memory alive, and eventually grew up and wrote the Caillou books as a memoir to preserve the memories. She eventually got married, had kids, who then grew up and got married and had kids of their own. The shorts take place in the far future, and the books she read to her grandkids are her own books.- Adding to this, the TV show is also canon in-universe. Caillou's brattiness was amplified at the order of the CINAR executives in order to teach morals preaching against that sort of behavior. And cue the Moral Guardians.
At least some of the songs exclusive to the Caillou's Holiday Movie soundtrack album originate from deleted scenes or material written for the film itself.
- They have the same production values as the songs that were in the actual film and many of them involve the actual characters rather than simply being cheery holiday tunes. It's very easy to imagine an animated fantasy sequence involving Caillou "Riding in Santa's Sleigh," or a scene in which Caillou and Rosie dance "The Santa Hop" on Christmas Eve before going to sleep.
Boris and Doris, Caillou's parents, are twins
Why else would they have rhyming names?- Assuming that's really their names, though it seems to be unclear whether or not that's actually a case of Urban Legend of Zelda.
- It would make sense that Caillou's parents are actually blood related relatives like Kirk and Louann Van Houten from [1], making Caillou inbred (it has yet to be revealed). It would explain why Caillou turned out the way he did.
Caillou grows up to be Professor Tinkerputt
It makes sense, as a kid who loves imagination would enjoy playing second-fiddle to Barney, a purple dinosaur who is imagination (and love) incarnated. Plus, both shows are infamous for having rabid hatedoms which somehow managed to gain mainstream attention. The TV show version of Caillou is not a kid with cancer; he just shaved his head in support of a loved one who did have it and his hair just hasn't grown back yet
Rosie was adopted sometime before the events of the series
It's the only way that she could have red hair while her parents are brunette.