The timeline of the series may or may not take place in episode order. Some indicators exist.

Order

• Let The Games Begin introduces Kat, precedes all others
• Beware The Were-Coop precedes all episodes Dennis knows Kat is an alien
• Something About Fiona first Coop-Fiona meeting, precedes all her later episodes
• Cheeks of Evil first Kat-Cheeks meeting, precedes Turn The Other Cheeks where they know each other.
• Kat to the Future Part 1 & 2 Coop changed the future where Millie didn't bring Kat home and the Earth was taken over by the Kat Invasion.
• Rebel With A Claw first Kat-Coop-Dennis-Kitten meeting where he ran away to Earth
• Kickin' Butler Coop saw Kat Kommander on the big screen in Kat's Scratching Post Lair.
• Turn The Other Cheeks Lorne and Harvey adopted Cheeks before the first Coop-Dennis-Cheeks meeting, precedes Strange Kat on a Train where Coop knows Cheek's voice already

• It's All In Your Head occurs after a previous episode involving the secret agents since Millie Burtonburger says they are back, referring to a prior encounter when they visited the home, like in Over the Radar
• Mind Games likely precedes other episodes where Millie has exhibited weather-altering powers
• Me Coop, You Kat likely precedes other episodes where Coop has exhibited extreme durability
• The Kat Went Back Part 1 All together Coop-Dennis-Lorne-Harley-Fiona-Millie-Dr.K-Kat Kommander meeting for the first
• The Kat Went Back Part 2 where Coop, Millie, Dennis, Fiona, Lorne and Harvey heard Cheeks's evil laughter in the Kat Prison.

Dates

June

• The Incredible Shrinking Coop occurs on Father's Day

October

• House of Scream happens on Halloween, as do Beware The Were-Coop and Trick or Threat

December

• Kid Vs Kat Vs Christmas and Fangs for the Memories occur on Christmas

July

• Hot Dog Day occurs on National Hot Dog Day

April

• Tom-Kat Foolery occurs on April Fool's Day
• The Three Aarghs occurs on Earth Day

March

• Good Luck Harm occurs on St. Patrick's Day