usually megavideo has them but they have time limits and its dumb
On the CBS website.
If you want to watch Big Bang Theory episodes for free, then there is a website called Graboid. Just type in on google, graboid and it should come as the first one. There is negatives of this website...
Age of Conan is one they play often and penny gets addicted to it.
Old enough to understand it and follow the plotline, so I'd say...12