I have an epic story arc designed to take place the next time I need to go away, wherein Nikita is....lost, to put it lightly.
but it could be a number of things you could do, Coma, dealing with something family related, captured by xyzq group to do xyzq thing, sold into slavery, missing in deep space, honeymoon, birth of a child, friend/lover severely injured, sabbatical, finding god, the list goes on and on and on.