The storyline with Meemaw is ok, but the Raj/Howard/Bernadette storyline shows how little writers on sitcoms care about continuity. Bernadette says she had doubts about her relationship with Howard, but he says he had no doubts. There was an entire episode wherein Howard questions whether Bernadette is the right girl for him. Katee Sackhoff and George Takei even made guest appearances in that episode. This sort of continuity error happens a lot in this show.