The X-Files (1993–2018)
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Sein und Zeit 

The strange disappearance of a little girl leads Mulder to make connections with previous unexplained cases of missing children. Scully believes he is becoming obsessed with the case by associating it with the abduction of his sister.


Michael W. Watkins (as Michael Watkins)


Chris Carter (created by), Chris Carter | 1 more credit »




Episode cast overview, first billed only:
David Duchovny ... Fox Mulder
Gillian Anderson ... Dana Scully
Mitch Pileggi ... Walter Skinner
Mark Rolston ... Bud LaPierre
Rebecca Toolan ... Teena Mulder
Shareen Mitchell ... Billie LaPierre
Megan Corletto Megan Corletto ... Amber-Lynn LaPierre
Spencer Garrett ... Harry Bring
Kim Darby ... Kathy Lee Tencate
Martin Grey ... Agent Flagler
Randall Bosley ... Ed Truelove
John Harnagel John Harnagel ... World Weary Dad
Marie Chambers Marie Chambers ... Guard
John Bisom John Bisom ... News Anchor #2
Nancy Tiballi Nancy Tiballi ... News Anchor #1


Mulder requests to be put on the case of a seemingly routine child abduction case of a missing little girl. Mulder finds a connection between this case and old x-files involving missing children. Scully believes that Mulder is personalizing the case, relating it to the abduction of his sister Samantha. Written by Muldernscully

Plot Summary | Add Synopsis


TV-14 | See all certifications »






Release Date:

6 February 2000 (USA) See more »

Filming Locations:

Altadena, California, USA See more »

Company Credits

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Technical Specs


Sound Mix:




Aspect Ratio:

1.78 : 1
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Did You Know?


'Sein und Zeit' is the original title of German philosopher Martin Heidegger's influential 1927 book 'Being and Time'. See more »


Interstate 74 does not go all the way West to California; it ends at a junction with Interstate 80 in Davenport, Iowa. It also does not run North-South, as the sign indicates. It runs East-West, as all even-numbered highways do. Odd-numbered highways run North-South. See more »


Scully: Mulder?
Mulder: Over here.
Scully: What is it?
Mulder: Diazepam. She used them to sleep.
Scully: Is there a note?
Mulder: No. She called when I was in California. She wanted to talk, but, uh... I never called her back.
Scully: Mulder...
Mulder: I didn't... Why would she do this? It just doesn't make any sense.
Scully: We never truly know why.
Mulder: No, she wouldn't kill herself. Why are these pictures gone? There were photos here. There were photos of my sister and I. This is all that she had left of us and they're missing. Why...? She saw me on the news. She ...
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References Pochacco (1994) See more »


The X-Files
Written by Mark Snow
Performed by John Beal
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User Reviews

Mulder once again questions what happened to his sister despite so much evidence pointing to what we all know. I'm
13 January 2017 | by david_hokey_16See all my reviews

Okay, so this was a good episode except for one thing. They once more did the bs with Mulder deciding his sister wasn't abducted by aliens but was instead taken like these other kids. Are we to believe he's that stupid after all of this? He freaking met her clones on more than one occasion! That includes clones of her as a child as she was when she was taken! He's seen enough about the alien conspiracy and learned from Cassandra about those that were taken by the aliens. They can't keep milking the whole "Mulder hangs onto hope that something else happened to his sister" when he's seen too much evidence to the contrary. They could've used her as fuel for Mulder's delving into the case without him rethinking her disappearance. It's just becoming a huge plot hole. This is otherwise a great, suspenseful episode. But I had to take points for the previously mentioned points.

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