A huge part of Star Trek: The Next Generations success was its superbly balanced core crew. That said, the senior members of the USS Enterprise-D didnt win over fans on their own they were bolstered by a fine complement of supporting characters. The enigmatic bartender Guinan, the ever-reliable Nurse Alyssa Ogawa, and transporter miracle worker Miles OBrien all added depth to the voyages of Enterprise-D And then there was Reg Barclay.