Season 1

1. "K-9" or "The Secret File of the Masticated Mongrel"

2. "Postal" or "The Secret File of the Contaminated Correspondence"

3. "Hair" or "The Secret File of the Frenetic Follicles"

4. "Homework" or "The Secret File of the Catastrophic Calculation"

5. "Bone" or "The Secret File of the Pilfered Porterhouses"

6. "Time" or "The Secret File of the Diggity Dogs"

7. "Earnest" or "The Secret File of the Manly Man"

8. "Spin" or "The Secret File of the Television Taboo"

9. "Twilight" or "The Secret File of the Meowing Mummies"

10. "Fetch" or "The Secret File of the Paleozoic Puppy"

11. "Small" or "The Secret File of the Diminutive Doggies"

12. "Water" or "The Secret File of the Disastrous Dehydration"

13. "I.H.R.F." or "The Secret File of the Felonius Fish"

14. "Oatz" or "The Secret File of the Appalling Apparel"

15. "D'Cell" or "The Secret File of the Nefarious Nerd"

16. "Halfday" or "The Secret File of the Hapless Half-Pint"

17. "Zero" or "The Secret File of the Criminal Calculator"

18. "Pups" or "The Secret File of the Patroling Pooches"

19. "Obedience" or "The Secret File of the Malicious Mesmerizer"

20. "DoggyLand" or "The Secret File of the Broadway Bowsers"

21. "Lunch" or "The Secret File of the Violated Vittles"

22. "Iditarod" or "The Secret Files of the Diabolical Dograce"

23. "Porkzilla" or "The Secret File of the Bacony Behemoth"

24. "Money" or "The Secret File of the Currency Crisis"

25. "Mange" or "The Secret File of the Ronin Rover"

26. "Scribble" or "The Secret File of the MMEREMMNNERE, MMNERNNMMRE!"