Could and episode work out if some guy that arnold and willis never seen before in their lives is claiming to be their father he claims he was their mothers ex boyfriend.

http://www.youtube.com/watch?v=RxVfiYYo0Nw
http://www.youtube.com/watch?v=0KflQ5--uSY
http://www.youtube.com/watch?v=RGJRkTIZAmQ