Walter flashes back to 1985 while explaining Peter's otherworldly origins to Olivia. Also, Peter's mother is introduced, and details of the neighboring world reaffirms that there is more than one of everything.



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Episode complete credited cast:
Peter Bishop (credit only)
Phillip Broyles (credit only)
Astrid Farnsworth (credit only)
General Hayes
General Tonks (as Julian D. Christopher)


Walter visits Olivia. Having a cup of tea together, Walter starts explaining to her how Peter is not really from our world. In the '80s Walter, who was a different man back then, built a device through which he could see the other Universe so, practically, a window to the other Universe. After Peter's death he wanted to do more than just observe; he felt it was his job as a father to do so. Because of September, Walternate couldn't figure out the right compound for the cure to save Peter's life so Walter decided to cross the worlds in order to save the other Peter. This, however, created a wormwhole into the alternate Universe that has had devastating consequences. Written by Andy Ward

Plot Summary | Plot Synopsis


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Release Date:

1 April 2010 (USA)  »

Company Credits

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Technical Specs


Sound Mix:


Aspect Ratio:

1.78 : 1
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Did You Know?


This episode takes place in 1985 and 2010. See more »


[about Walternate]
Dr. Walter Bishop: He's just like me. I wouldn't look back, and neither will he.
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Crazy Credits

The episode's opening titles have been redone as though it were a show from 1985, complete with an '80s version of the theme tune and decade-specific fringe science topics such as "stealth technology", "virtual reality", and "in-vitro fertilization". See more »


References National Lampoon's European Vacation (1985) See more »


End Title Theme
Written by Michael Giacchino
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User Reviews

Gob smacked
28 May 2015 | by (North America) – See all my reviews

Good shows, even great shows, have their ebbs and flows, their ups and downs.

Sometimes the producers will sense that a change of pace is needed and they will, like that famous TV chef, kick an episode up a notch by adding "creative salt." That said, nothing to date in this series prepared me for the raw emotional power of this episode. Wow.

Perhaps it was an inside joke by the writers to feature the marquee for one of the BACK TO THE FUTURE films in their alternate universe, but intended or otherwise the reference was spot on.

In terms of production standards, writing, directing, special effects and even the excellent makeup, this single episode packs the emotional punch of a freight train and as good as anything you might see on the big screen.


7 of 7 people found this review helpful.  Was this review helpful to you?

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