The season two premiere was supposed to be the episode 'Re:Union'. However, the episode would not have involved John, D'Argo or Aeryn, and it was determined that people would not want to wait another week to find out what happened to those characters. So the second episode, "Mind the Baby", was aired first and "Re:Union" was retitled Dream a Little Dream (2000) and given a frame story to make it a flashback.
Starting with Season 2, the make-up on the character Ka D'argo is a dark shade of brown instead of the light shade it was in Season 1. No explanation is ever given.
Zhaan is acting almost psychotic, believing that Crichton is dead. That is due to the events of Dream a Little Dream (2000) which although aired as S2-E8, took place before this episode, effectively occurring during the break between Seasons 1 and 2.