Oh no, Star Trek exists, it's just that Hiro's dad looks alot like Sulu to us non-Japanese types. Let's be honest, they all look alike to us unless we've seen alot of them.
So back me up/shoot me down some othe those who've been more attentive during the episodes, as I don't always catch the episodes as they air, mirrors or anything that casts a good reflection is the catalist for the Nikki/Jessica switch, correct?