Christopher said:
C.E. Evans said:
The odd thing about "Enterprise: The First Adventure" is that it's in sync with James Blish's adaptation of "Where No Man Has Gone Before" written many years earlier.
-Piper is listed as a temporary replacement for McCoy while he was on leave from the ship.
-Sulu is mentioned as moving from helm to astrophysics.
-Mitchell is more or less someone who wasn't on the ship originally but became very popular with the crew since coming aboard.
-I think (but I'm not sure) that Alden was said to be a temp for Uhura.
Well, Blish did that because he did the adaptation fairly late in the series and needed to justify why the cast was different than it was in previous tales. Also, WNMHGB was the third episode to be aired, and showed up in that order in syndication packages for the first couple of decades, so to most viewers it must have seemed as though the established cast abruptly changed for a week and then went back again. (Also the uniforms, sets, and equipment changed, but none of those would've been evident in Blish's adaptation.)
What McIntyre did had different reasons behind it. She was writing from the assumption that WNMHGB took place before the rest of the series, but she still chose to do a book that featured the characters the readers were most familiar with. So that also, independently, led to the interpretation that the crew in WNM had gone through some temporary changes from the familiar bunch.