
Apparently, he's 12-down in
the TV Guide crossword PUZZLE.
The Big Bang Theory Season 7, Episode 19

Your next PUZZLE is a riddle.
The Big Bang Theory Season 7, Episode 3

where the last PUZZLE gives the winner
Sheldon's contact information.
The Big Bang Theory Season 9, Episode 8

Which, other than its
surprisingly fun PUZZLE page,
The Big Bang Theory Season 7, Episode 17

But we haven't
finished the PUZZLE.
The Big Bang Theory Season 7, Episode 3