The Extract Obliteration
Taking leaps from the start of the season, this episode showcases the heights of Sheldon's eccentricity and his state of friendship with Stephen Hawking. Penny treading the community college road. Leonard being absolutely crazy about Penny's educational chosen path. Raj coming out of his introvert shell and giving a taste of his wit and Howard giving his insight on the current happenings with a Stephen Hawking impersonation and doing his Indian Guy accent.