Logline
On the way to the next clue, the U.S.S. Discovery is sabotaged by a mysterious weapon, leaving Captain Burnham, Rayner, and Stamets as the only crew members who can possibly save the ship in time.
Written by: Sean Cochran
Directed by: Lee Rose
In that episode more time had passed, and Zora never mentions the crew by name, so the crew she was waiting for to return might have been replacements who never arrived.
True, but also it’s the Discovery, not the Discovery A we have now.
Calypso has to be assumed to be canon to a prevented timeline (maybe one where Control won at the end of season 2 etc.)