After last week which I thought was one of the weakest so far it's good to see it hasn't gone downhill. Sheldon was on top form and the whole controlling things in different countries like lights and RC Cars was funny. Wolowitz being as pervy as ever.
The fight at the lecture between Sheldon and Leonard was the funniest bit especially with over objectionable Sheldon trying to blow Leonard's head apart (like in scanners) with his mind. The fact he wanted to tell the most inane anecdote about how the idea for their research came about was just classic Sheldon. As is his reaction to Penny who accidentally implies that it was Leonard that came up with the idea.