"Riddle me this.
The Big Bang Theory Season 7, Episode 3
Good RIDDLE, huh?
Yeah.
The Big Bang Theory Season 7, Episode 3
Ooh! I do love a RIDDLE.
Oh, let me see.
The Big Bang Theory Season 11, Episode 11
Okay, then RIDDLE me this.
The Big Bang Theory Season 1, Episode 10
"Riddle me this..."
Got it.
The Big Bang Theory Season 7, Episode 3