This is an episode that keeps you guessing. The other reviewer gets it right - except does not mention that it is completely unclear by the end of this what actually happened. Was Riker really kidnapped? Or was this play more complex than that? We see this from Riker's perspective - but it is unclear whether it was Riker the actor of the play, or Riker the victim of the madness that is this episode. The scene in which the audience is applauding while Riker seemingly has a panic attack underscores this - is it an illusion cast by the aliens, or is this merely a part of the play? This is one that makes you think, and you'll definitely go "huh?!" throughout it. But it is nonetheless well written and very well acted. One of Jonathen Frakes' best performances in the series.
Review of Frame of Mind
