On the most recent episode of 'The Sarah Jane Adventures', Colonel Karim of UNIT tried to force Sarah Jane's young associates Rani and Clyde (as well as Jo Grant's grandson, Santiago) out of hiding. In her conversation with one of her alien allies, a Shansheeth, the Colonel referred to the kids as "The Brady Bunch".
This potential Zonk has been discussed several times here at Inner Toob. It's probably one of the five most popular Zonks we've got going. But it's easy to splain away.
Here's the latest entry to splain away the "Brady Bunch" Zonk.