Didn’t you mean this documentary ?? 
To my Latino brethren and sistren-- Walter Mercado is still kicking it at 84.
The two most remembered participants of the 1950s quiz show scandals: Herb Stempel (90) and Charles van Doren (91).
On a somewhat related note, does anyone know if Carl Reiner is a great-great-grandfather? He’s 94. His son, Rob Reiner, is 70. Rob’s daughter Tracy is 52 and according to Wikipedia, she has three children. So Carl Reiner is a great-grandfather. But it seems that the children of a 52 year old woman are possibly old enough to have children of their own.
You would think! glares at my children