
Happy KITTY, sleepy...
The Big Bang Theory Season 4, Episode 2

Happy KITTY, sleepy KITTY
Purr, purr, purr
The Big Bang Theory Season 10, Episode 20

Sleepy KITTY...
The Big Bang Theory Season 2, Episode 21

Sing "Soft Kitty."
The Big Bang Theory Season 2, Episode 21

♪ Happy KITTY, sleepy KITTY
The Big Bang Theory Season 12, Episode 19