19Q's One And Only Appearance ("Q-Less" S1, E7)
Q was one of The Next Generation’s greatest additions. This god-like being was capable of just about anything, and enjoyed toying with the Enterprise crew, especially Picard. In fact, he was so beloved and critical that he was the driving force of the superb series finale, which might be
the best episode of the entire franchise.
Unfortunately, Q and all his mariachi band antics were added to Deep Space Nine, which, just by reading that sentence, you can tell was a mistake. He appeared only once, and rightfully so. Q just didn’t belong in DS9’s realm, and this awful episode proves it. One positive moment is Sisko punching him in the face, though, so we’ve gotta give credit where credit is due.