http://uproxx.com/tv/2015/01/every-family-guy-time-travel-episode-ranked/

Some of Family Guy’s best episodes over the years involve the usage of Stewie’s time machine. The ability to move through time enables the writers to bend the rules of reality even more than usual, and often leads to some of the show’s most inspired storylines. Let’s look back at every time travel episode, and see which episode was finest of them all.

http://uproxx.com/tv/2015/01/every-family-guy-time-travel-episode-ranked/

"Back to the Pilot" is my favorite time-travel episode and, indeed, one of my favorites of the entire series. I think it's the best episode of the past few years anyway.
I have caught myself on the occasions I've seen the pilot since "Back to the Pilot" aired, noting where Stewie and Brian would have popped in from the future, then left.
"Road to Germany" was pretty good, but like many others I thought the McCain-Palin button insertion was completely pointless. MacFarlane never passes up a chance to slam conservatives. I wish Obama had been ridiculed on the show the past six years like Bush was.