When I was developing the series, I wanted the episode titles to reference cats in some way. Wondering if I would be able to come up with enough cat related titles for the whole series, I prepared a list from internet searches that I could pick from which should last for several seasons.

Copycat
The Great Catzby
Catatonic
Alley Cat
Cat Burgler
Tom Cat
Cat Noir
Crazy Cat
Meow or Never
Cat-22
Cat Me If You Can
Whiskers in the Dark
Cat and Release
The Pawful Truth
The Wizard of Paws
Catman Begins
Dude, Where's my Cat?
CLAW-E
Catsino Royale
Cattyshack
Mission Impawsible
Everything You Wanted
  to Know About Cats,
  but Were Afraid to Ask
Hairball
Kitty Kitty Bang Bang
Catsaway
While the Cat's Away
Cats on a Spaceship
Citizen Cat
The Empire Strikes Cat
Escape Paws
Puss in Boots
The Purrminator
Cats on a Plane
Cats of the Caribbean
The DaVinci Cat
Cat Wars
Just Kitten
Cat Got Your Tongue?
The Cat in the Hat
Catastrophe
Cat's Out of the Bag
Hep Cat
PAWS
Cataclysm
Mu
Cat in Mouse
Catscan
Crazy Stupid Cats
Fur Flies
Feline Fatale
Pawsome
Itty Bitty Kitty
Paws and Effect
Fur Ball
Furocious
Furever Home
Kitty Corner
The Feline Mystique
Missed by a Whisker
The Catbird Seat
No Room to Swing a Cat
The Cat's Pyjamas
Curiosity Killed the Cat
Nine Lives
Catacombs
Catalogue
Catalyst
Catapult
Catagory
Cattycornered
Caterwaul
Catnap
Cat's Cradle
Catspaw
Cat-Tale
Cat Walk
Catty
The Cat From Outer Space
As Nervous as a Cat in a
  Room full of Rocking Chairs
Cat's Eye
Cat's Whisker
Clowder of Cats
Cool Cat
Fat Cat
Herding Cats
Sourpuss
Sweeten the Kitty
To Skin a Cat
Cat on a Hot Tin Roof
Cat Women on the Moon
One of Our Cats is Missing
Scaredy Cat
Felis Catus
What the Cat Dragged In
You Had Me at Meow
Dämmerung Der Katzen
The Cat Came Back
Escape Claws
Cat's All Folks
Catnip
Claws for Alarm
Schördinger's Cat
The Cat's Meow
The Strange Case of Mr. Anderson's Cat
Cat Women on Mars