10 Star Trek Characters Who Appeared On Multiple Series

10. Reginald Barclay

Many of Star Trek's most interesting characters are not members of the main cast. Often, some of the best characters are the recurring ones that pop up once in awhile and add in something special. Q was such a character, bringing chaos to whatever story he was in. Though he wasn't as chaotic, Reginald Barclay was a similarly beloved character.

Barclay was first introduced on The Next Generation. An engineer working under Geordi LaForge, he was quiet, nervous and anxious, using the holodeck to avoid life. But once he came out of his shell, Barclay proved to be a brilliant engineer who just needed self confidence. He became an important member of the Enterprise-D team.

But while he played the part of comic relief on TNG, he became a critical part of Voyager by the end of the series.

Working on the Pathfinder Project for Starfleet after the destruction of the Enterprise, Barclay figured out how to contact the Voyager in the Gamma Quadrant with the help of Deanna Troi. He established a permanent means of communication with the stranded ship and became an integral part of bringing Voyager home.