In the latest episode of “Family Guy,” both Brian and Stewie got a taste of the limelight in “Brian’s Play.” First up was Brian, who composed a play that became the toast of Quahog, for what that was worth. Even Lois was impressed of Brian’s accomplishment: “It’s hard to believe it’s the same dog that barked at a pineapple for four hours.” Peter also was delighted, though it brought back not-so-happy memories of his own stage experiences as a child, when he played the plant in “Little Shop of Horrors”and had a little “accident” in the suit. Alas, only one of those happy/sad theater masked people had a good time. Oh well. Can’t please everyone, I guess.