X-rated should never be underrated. NSFW: Many porn covers ahead.
Star Trek is a series that chronicles a crew and their deep-space adventures.
CBS Television
But if you're looking for another adventure that also goes into deep exploration, you should check out...
Moonlight
Buffy the Vampire Slayer is a show featuring a huntress on her journey to destroy bloodsucking vampires.
WB
But if you like adventures that involve a different kind of sucking, you should take a look at...
CDI Digital