Conversation so far:
what was the treatment in a beautiful mind
Nash is given a course of insulin shock therapy and eventually released.
who does the movie a beautiful mind star
The film stars Russell Crowe, along with Ed Harris, Jennifer Connelly, Paul Bettany, Adam Goldberg, Judd Hirsch, Josh Lucas, Anthony Rapp, and Christopher Plummer in supporting roles.

Question: who plays nash
Self-contained rewrite: who plays nash in a beautiful mind