Charlie was an orc who wanted to become an elf again (despite that he could never have been an elf to begin with). He attempted to rescue his girlfriend Alex from Orthanc, but only succeeded in getting captured and getting Saruman drunk, for some reason. And then getting captured again in Mirkwood. No, it doesn't make any sense to us, either.
Jay and Acacia caught up with Charlie in the Mirkwood prison.
Jay threw Charlie into Mount Doom.
Charlie was charged with "misrepresenting the entire race of orcs, bending the laws of biochemistry and getting Saruman drunk, ignoring the laws of gravity by falling off a big-arsed tower and not dying, and for being able to manifest a harmonica."