A Free Scratcher and Feminine Wiles - S5-E14
Factual error: Dr. Lee says that she worked on IBM's Watson. The episode takes place in the 1980s or early 1990s. The Watson program was from 2004 to 2011. It won on "Jeopardy" in 2011.
A Stunted Childhood and a Can of Fancy Mixed Nuts - S2-E10
Factual error: Sheldon sees a billboard on the joke rack, where it says "it's a bazinga." In the corner of the board, it says Toledo.com, wrong for 1990.
Suggested correction: It says "Toledo, OH" as in Toledo, Ohio where the company would be based.