. . "Sheldon asking about a letter from Howard's father."@en . . "The Closet Reconfiguration"@en . . . . . . . . . . . . . . . . "6"^^ . . . . . . . . . . . . . . . . . "19"^^ . . . . . . . . . . . . . . . . . . . . . . "Penny and Leonard host a cocktail party. Howard discovers a letter he received from his father, whom he hasn't heard from since he was 11."@en . . . . . "2013-03-14"^^ . . . "Season 7"@en . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . "Penny and Leonard host a cocktail party. Howard discovers a letter he received from his father, whom he hasn't heard from since he was 11."@en . . . . "Season 5"@en . .