Or changes to the past, then eventually to the future, don't effect timetravelers rooted in the past.
"Divorced from their own continuity"
Besides, they explained away Kellog, made it dusty, claiming that she might not not have been his grandmother, secret adoption, someone cheating and raising someone elses bastard. Shit happens.
That was last year.
Last year disappoint me.
This year there has been less episodic dead end bottle shows. Almost every episode has contributed and added to the over all plot.
A vast improvement.
2 more weeks till a new episode.