One Man Covered in Mud (泥まみれ男ひとり Doromamire Otoko Hitori) is the 11th episode of Ultraman Leo.
Alien Kettle has come to earth, killing the uncle of a child. How will he deal with his grief?
While the children train, MAC is fighting off Alien Kettle. Gen pursues him, but the alien kills a man, a boxing champion, leaving behind his cousin, Ichiro. Ichiro refuses to believe anyone could be stronger than his uncle, or that MAC could defeat the alien.
Gen trains to confront the alien before being called out. Kettle then kills Ichiro's aunt as well. Gen engages the alien, and it nearly kills him, however, Dan saves him. Gen later manages to slightly comfort Ichiro, and seeing him train, decides on a way to defeat Kettle. He trains.
Later, Kettle reappears. Gen manages to knock him down, when the alien grows to his giant form. Gen transforms into Ultraman Leo. After a long battle, he defeats the kaijin. Later, Gen bids farewell to Ichiro, who departs back to America.
Ultraman Leo Volume 2 features episodes 9-12, & Complete DVD-Box Features All Episodes.