Worries of a father and son
5 parts Complete Right when everybody thought that Leonardo would be back to his old self, he is retreating to himself again, which triggers Splinter to talk with him. Father and son voice their worries and come to a conclusion that sometimes you have to tell the other what bothers you. 2003 universe. TMNT currently belongs to Nickelodeon.
(A story that was originally written on the site fanfiction.net. If you see this story there under the name of Natalie Ryan, I'm not stealing it, it's me on that page)
Enjoy.