Hulu.com: 'Cousin Oliver' Round-Up: 9 of TV's Inexplicably Added Children
Huffington Post - over 4 years
In The Brady Bunch's fifth and final season, all of the Brady kids were looking a little long in the tooth: Marcia had crow's feet, Greg was using a walker, and Cindy traded in her ruffled socks and Mary Janes for sensible support hose and orthopedic shoes. America was sickened to see a Brady over the age of 12. As a last-minute gambit to salvage the show, eight-year-old Cousin Oliver joined the family, and oh, the hijinks and hilarity that ensued. We're guessing the kid had some repressed issues: his parents ditched him with the Bradys while they went on an archeological dig in South America.
In the course of his first day with the family, Oliver managed to ruin Jan's painting, cover Greg in ketchup, crack a terracotta pot, undo Carol's knitting, break a stack of dishes, and shatter a lamp. (Every scene with Cousin Oliver ended in the "wuh, wuh, wuh" sound effect.) Five episodes later, Oliver managed to kill the entire series (it was cancelled that season).
Article Link: Huffington Post article