Starting on September 8, 1990 (with a different opening sequence), the show began its run on CBS. The CBS weekend edition ran for a full hour until 1994, initially airing a few Saturday-exclusive episodes back-to-back. Also, a brief "Turtle Tips" segment aired between the two episodes, which served as public-service announcement about the environment or other issues. After 1994, the show was reduced to just a half-hour and only eight episodes per season were produced, grouped into a "CBS Action Zone" block that also featured "WildC.A.T.s." and "Skeleton Warriors", both of which were canceled after one season; though TMNTs retained their "Action Zone" introduction. The series ran until November 2, 1996, when it aired its final episode. Its enormous popularity gave rise to its numerous imitators, including the "Battletoads", "Cheetahmen", "Wild West C.O.W.-Boys of Moo Mesa", "Road Rovers", "Street Sharks", "Extreme Dinosaurs", and "Biker Mice from Mars". Currently, all 193 episodes are available on DVD and VHS.