The Nickelodeon kids' TV show Rugrats was harmless enough, right? I mean, there was that questionable shot of Tommy squirting milk at the camera in the show's intro, but other than that there was nothing sinister about it… OR WAS THERE?
A disturbing theory about the cartoon suggests that all of the characters actually exist within the mind of a schizophrenic and bipolar Angelica (which explains her volatile behaviour). According to the theory, Chuckie died along with his mother, explaining why his father, Chaz, is such a nervous wreck. Tommy was a stillborn, which is why Stu is in the basement all the time making toys for his son that never was, and the DeVilles had an abortion, but seeing as how Angelica didn't know the sex of the child, she instead imagined twins, Phil and Lil, of both genders.
Going further into the rabbit hole, the theory also suggests that Angelica's mother died from a heroin overdose, and that the woman whom her father Drew married was just a gold-digger, who Angelica had convinced herself was her real mother out of grief. Her omnipresent doll, Cynthia, whom Angelica regularly talks to in the show, is Angelica projecting her mother's personality onto an inanimate object, with the doll's patchy hair and tatty dress mimicing the appearance of her deceased drug-addled mother.
Or, y'know, it's just a show about babies.