10 Greatest Star Trek Bottle Episodes
6. Time Squared
The fun thing about Time Squared is how it handles time travel. In almost all cases before this episode, time travel was simply a means to an end - whales or no whales. Here, however, there is a tangible effect on Picard as he travels into the past, including nausea, dizziness, and death.
The last one may have come from the other Picard's phaser. It's not important.
What's important here is that the central idea - Picard goes six hours back in time - is fascinating. Never before had such a short hop back in time been explored, thus adding a level of tension to events as the clock is an awful lot shorter than we'd been used to.
There is a version of the story that would have seen this as a prequel to Q, Who? Maurice Hurley felt that the episode was weaker for the removal of Q as the cause, feeling that the Enterprise simply flying into the Mobius was an anti-climactic ending. This then is one of the tantalising hints at the Q arc we could have seen through The Next Generation's second season.