Soul Posession's flashback (taking place after Sacrifice, but before Sin Trade and A Family Affair) do not coincide with each other at all. Everyone seems to act out of character (with the exception of Joxer, who is very good in this one), and the overall vibe doesnt feel right.
The only redeeming qualities is the humor: the present day sequences we're halarious, aswell as [some] parts of the S3 flashbacks. And of course, Annie Day and Harry are always fun (Mattie never did much) to watch. Along with some sweet Xena/Joxer scenes [S3 flashback] Soul Posession doesnt have much to offer.
Take the vague explaination of Gabrielle and Hope's whereabouts in 'A Family Affair' anyday.