Uncle Traveling Matt (performed by Dave Goelz in the live-action series, voiced by Patrick Pinney in the animated series) -- Gobo's famous (as well as pompous, clumsy, and absent-minded) explorer uncle, spends most of the series in ``Outer Space'' (the Fraggles's perspective of the human world) and sends postcards back to his nephew describing his adventures there.
Dave Goelz
Patrick Pinney