Episodes:
19. Blast Off
20. Dead Reckoning
21. The M.A.J.O.R. and the Minor: Part 1
22. The M.A.J.O.R. and the Minor: Part 2
Dead Reckoning is an interesting epsisode, in which the series' repeat antagonist: Hammerhead is revealed to be the victim of brainwashing.
It sets the character up to work alongside Spencer and Bru in the second season, which was never made.