So yeah, good episode. Just a couple of nitpicks.
- How come Shredder didn't recognise the Turtles back in season 1 if the timeline was always this way?
- Why didn't they show Shredder learning of his heiritage?
- Why did those ninjas join the foot so quickly?
- Did Mikey really have to act so goofy in this episode? I know he's typically very goofy, but I think they should have toned him down here.
Also, is it just me or does some events as shown here put some of Splinter's previous statements into question? I can remember Splinter having said something like "she was never yours" in regards to Shredder having been with Tang Shen, but here Tang Shen does not deny having been with Shredder.