Walter explains to Olivia how Peter came from the alternate universe, and how he was willing to risk everything to save his son.
| Creator | J.J. Abrams |
|---|---|
| Actor | Anna Torv, Joshua Jackson, Jasika Nicole |
| Country | United States of America |
| Production | Warner Bros. Television |
| Season 0(46 episode) |
|---|
| Season 1(20 episode) |
| Season 2(23 episode) |
| Season 3(22 episode) |
| Season 4(22 episode) |
| Season 5(13 episode) |
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