♪ Happy kitty, SLEEPY kitty
The Big Bang Theory Season 12, Episode 19
Sleepy kitty.
The Big Bang Theory Season 2, Episode 21
♪ Happy kitty, SLEEPY kitty... ♪
The Big Bang Theory Season 5, Episode 6
Happy kitty, SLEEPY kitty
Purr, purr, purr
The Big Bang Theory Season 10, Episode 20
You know if you stay up all night,
you're going to be SLEEPY tomorrow.
The Big Bang Theory Season 6, Episode 22