This thread puts me in mind of a marvelous "one off" tv show staring Leonard Rossiter. A character in the show, played by Rossiter, is convinced that he saw a brief glimpse of Burt Reynolds in an episode of "MacMillan and Wife". Burt isn't listed in the credits or is the appearance listed in Burt's film biog, but still the character is convinced he's correct. Eventually, he manages to get through to Burt on the telephone. Burt tells him that he never appeared in "MacMillan and Wife", to which the Leonard Rossiter character replies, "Come on Burt, you can't possibly remember everything you've appeared in!" However, I think many of us have been guilty of something like that in our lives - but maybe not to the degree of the character in the above mentioned show!