when does raj learn to talk to penny
Raj Koothrappali At the end of the Season 6 finale "The Bon Voyage Reaction", Raj's girlfriend Lucy breaks up with him. The subsequent trauma apparently cures his mutism, and he finds he can talk to Penny, Amy, and Bernadette while completely sober. However, he talks so much that the women become bored and irritated and start drinking in order to put up with him.