Samurai Jack - Time paradox

Future Jack has taken Past Jack's place in the past. Past Jack is sent to a future where Aku no longer exists. Several years of wandering the future later, Past Jack comes across a giant blue man with tiny red sunglasses standing infront of a big machine.

The Guardian " It's about time you showed up."

The finale was a big ball of wibbly-wobbly timey-wimey stuff.