[cuz_it_aint_their_money]

The major question is, how, in "Wrath of Khan", did Chekov know about Khan, since he didn't join the crew until after the encounter? ;')

Simple, Chekov learned about the whole Botany Bay encounter while attending Starfleet Academy. Any Star Trek geek knows that! :~D

[SunkenCiv]

You'd think that he'd have learned to count the planets in the system before beaming down, then. ;')

[scrabblehack]

How did Khan know about Chekov?

Hmmm...people didn't have DVD's and VCR's then like they do now so they couldn't check for discontinuities like this one.