Personally, I think CL stopped airing in CN due to poor ratings. Can't blame CN if that's true.

Out of boredom, I'll rant about the episodes that didn't air on CN. The show sucked at one point that I just simply waited for the episodes to get hanged on Youtube, since CN.com doesn't let people from outside USA to view their videos.

Episode 89: Music Soothes The Savage Beast - Shitty title for an episode, but the episode was pretty good. I loved the real world scenes, as in I find them more appealing than the heavily repetitive Lyoko scenes.

Episode 90: Wrong Exposure - Here's where the truth about Waldo Schaeffer is revealed. WS was Franz Hopper's true name. They mention it by the end of the episode. Other than the final scene and the Ulrich-Aelita fight on Lyoko, this episode was forgettable.

Episode 91: Bad Connection - Nice idea of XANA getting people possessed via cellphones. Now this would have been a good episode if the villain dialogs (see: possessed people) wasn't kinda forced. Sissi/Odd interactions was pretty cool. Ulrich moving slow on the Overboard was well done too and believable. Not a bad episode.

Episode 92: Cold Sweat - This episode was kinda shitty IMO, too much crap from Odd is overkill in a episode. First 9 minutes of the show made me remember well why I hated the fucker and I wanted him to die. The final scene made me chuckle, though.

Episode 93: Down To Earth - Kinda dull episode IMO. The Skid gets destroyed by the Colossus (big black monster XANA made). William's polymorphic clone meets William's parents, the scenes were kinda meh. A meh episode IMO. By the end, William comes back to Earth.

Episode 94: Fight To The Finish - Silly title, great episode. One of the best episodes in Season 4. Hopper dies, and the Replikas are destroyed... which leads to...

Episode 95: Echoes - Nice way to end the series. Debating whetever or not to shut the supercomputer for good (Yumi wants to, the rest won't, they get nostalgic and this episode features a shitload of flashbacks from past episodes), Sissi managed to put a GPS locator on Ulrich. Sissi finds the truth about Lyoko on the diary-type videos Jeremie made and goes tell her old man. He believes she's nuts... and then a RTTP solves the thing. Sissi later becomes friends with Team Lyoko (lazy writing IMO) and the Supercomputer gets shut down. And no kissing from Yumi and Ulrich, I lol'd at that.