The best way to get to know all Bones-characters is of course, kwa starting at the beginning of the series. If wewe start watching in the midst of season 3 wewe will have missed out on a lot of what makes Bones such an incredibly great show.
If wewe still insist on getting to know the characters in another way, Wikipedia is your safest bet:
link)
On the Wikipedia page wewe will see a column (right under the introduction) that reads 'contents'.
wewe will find that in getting to know the show, it's easiest to start kwa kusoma '2.1 Plot Summary' followed kwa '3 Characters'.
wewe can click on names of various characters to go to their character biography page.
wewe might also like to try FOX's official Bones site. You'll find it under the following link:
link Again; I recommend wewe start watching season 1 first :)
Have fun!