While I cannot truly claim that this series is either my favorite animated(or any show)or even high quality(that still probably belongs to either "The Simpsons" or "South Park"),I been finding myself greatly enjoying many of these shows on reruns either on the local FOX channel,TBS or on Adult Swim. This one is particularly good.
Peter gets his wish(granted by the Grim Reaper,of course!)to go back in time to 1984 to get to spend one night of swinging bachelor activity instead of what he actually did,which was go steady with Lois on the way to marrying her and becoming,well...the Family guy. Doing so changes the future grossly and now,flanked by trusty friend,sidekick(and truly the one voice of reason in this family)Brian,Peter must change over the events of the altered past to bring back the present he is meant to be in. Plenty of the stock fast gags and side-references(though somewhat lighter on the latter than usual)and a nearly plot-point by plot-point following of the movie Back to the Future makes this ep particularly special to me.
So far this,along with the Blue Harvest episode and the two-part Stewie-kills-Lois/Lois-kills-Stewie eps would have to be my faves of the fair amount of shows I've caught. This show may not but in sum great,but it has more than its share of brilliant moments. This is one of them.