When Maureen translates Walter's Latin, she says "Unless you believe, you will not understand," she is actually quoting St. Augustine, who misquoted the Latin "If ye will not believe, surely ye shall not be established." (KJV)
Lisa Donovan is a high school junior, but in her FBI file, her date of birth is marked as 11/19/1982. That would make her 27 going on 28 if the episode took place in early January 2010 when it first aired (out of sequence airdates notwithstanding).
Trivia: The glyph code for this episode is AVENGE.
Trivia: The Observer can be seen behind Olivia, walking right to left, as Olivia and Lisa's mom have a conversation about faith after Lisa and her mom exit the church.
Peter: What do I think happened to Lisa? I don't think she's alive because God changed his mind.
Olivia: I'm just waiting to see if lightning strikes you.
Peter: At least they got you some nice balloons.
Lisa: I guess they couldn't find ones that said, "Welcome back from the dead."
Peter: Yeah, well, I imagine those would be more of a special-order kind of thing, don't you think?
(as they watch an old film of Walter)
Walter: Hello, I'm Dr. Walter Bishop. This is test subject number six.
Peter: What happened to subjects one through five?
Walter: I believe the university settled with them out of court. They probably never had to work again. Not that they could
Walter: Perhaps, if I could examine the girl, but you say her mother has refused that.
Astrid: After watching Walter's Scariest Home Videos, who can blame her?
Walter: Please allow me a moment to entertain my fantasies. They often lead to a truth.
Peter: Well, you know me. You tell me that the U.S. government is covering something up, I'll tell you it must be Tuesday.
Lisa: Ever since what's happened, they think I'm, like, a freak or something.
Peter: Well, I don't think you have to worry about us here. We're kind of partial to freaks in this lab.
Lisa: So is Agent Dunham, like, your girlfriend?
Peter: No. No. She's like a friend who's a girl. And who carries a gun.
Walter: I would propose that Mr. Rusk stuck around to deal with unfinished business. And once he did, then, well Lisa was free to finally purge herself of him.
Maureen: How can we be sure?
Walter: Nisi credideritis, non intelligentis.
Maureen: I don't understand.
Walter: Latin translation of Isaiah 7:9.
Maureen: "Unless you believe, you will not understand."
Walter: Even as a scientist, sometimes I have to rely on faith.
Maureen: God keep you and yours safe, Dr. Bishop.
Walter: And you, ma'am.
Latin America: February 9, 2010 on WB
Sweden: February 11, 2010 on Kanal 5
UK: March 2, 2010 on Sky1
Czech Republic: April 9, 2010 on Nova Cinema
Germany: August 2, 2010 on ProSieben
Poland: November 18, 2010 on TVN
Finland: December 1, 2010 on MTV3
Slovakia: May 21, 2012 on Markiza
Blair Brown is credited but doesn't appear.
This episode was originally scheduled to air near the end of Season 1, but was held back until 2010. This led to several continuity glitches, including one main character, and the crew from the 1st season being listed.
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