A number of famous people appeared with secrets , including Col. Harland Sanders who founded Kentucky Fried Chicken ( `` I started my restaurant with my first Social Security check '' ) , Philo T. Farnsworth ( `` I invented electronic television '' ) , Pete Best ( `` I used to be one of THE BEATLES '' ) , and an elderly man , Samuel Seymour , who was the last surviving eyewitness to Abraham Lincoln 's assassination ( he was 5 years old at the time ) . A number of notable people appeared with secrets including Col Harland Sanders ( `` I started my restaurant with my first Social Security check '' ) , Philo T. Farnsworth ( `` I invented electronic television '' ) , Pete Best ( `` I used to be one of The Beatles '' ) , and an elderly man Samuel J. Seymour who was the last surviving eye witness to Abraham Lincoln 's assassination ( he was five years old at the time ) , Bobby Fischer ( `` I am the US chess champion '' ) .