When the passengers on a commuter train all die instantly of massive power loss, the team realizes that a time traveler is responsible... and that it may be impossible to apprehend him. Meanwhile, Walter writes a letter to Peter explaining his origins.
| Creator | Alex Kurtzman |
|---|---|
| Actor | Anna Torv, Joshua Jackson, Jasika Nicole |
| Country | United States of America |
| Production | Warner Bros. Television |