DS9 - During a festival that remembers and honours the dead, the station inhabitants are visited by friends and family members who have since passed away.
VOY - Voyager
is hit by an unknown energy wave that causes the crews memories and personalities to switch into the bodies of those nearest them.
Commander Austin Harris, First Officer, Deep Space Nine (by FltCpt. Bossco)
8.01 - Darkest Before Dawn
(Chapter 8 added, 12/09/2015)