Well .... let me put it this way ....
Star Trek ... first series. Captain Kirk, Mr. Spock, Scotty, Sulu ... you have probably heard of them.
Star Trek Next Generation ... second series, occurs in time after the first series. Has Captain Picard, Commander Riker, Worf ....
Star Trek Voyger and Deep Space Nine .... two spin offs, roughly contemporaneous with STNG.
Enterprize ... a prequel to the original Star Trek. Had Captain Archer, T'Pol (resident Vulcan observer), Trip Tucker ..... and like that there.
I hope that's at least a little help ....
