In truth, I haven't rewatched these episodes in years because they're so depressing; nevertheless Christmas Carol and Emily are essential viewing to understand and appreciate the character arc of Dana Scully.
Writers: Vince Gilligan,John Shiban and Frank Spotnitz
Director: Peter Markle
Originally aired: December 7, 1997
Synopsis: While visiting her family in San Diego, Scully is contacted by her sister Melissa's spirit, who prompts her to become involved in a murder case. During the course of this investigation, Scully discovers that she has a genetic daughter, Emily, who was created from an ovum stolen from Scully while she was a prisoner of the Consortium.
Most Memorable Quote: Just reading through the quotes is making me feel so sad.
SCULLY: Who are the men who would create a life whose only hope was to die?
MULDER: I don't know. But the fact that you found her... and had a chance to love her... Then maybe she was meant for that too.
Links:
Review by Joanne Larue. We have such a smart fandom. And thank God for the Wayback Machine.
A.V. Club reviews:
Christmas Carol by Zack Handlen
Emily by Todd VanDerWerff
For Emily Wherever We May Find Her by
fialka. Technically this essay is about "All Souls" but you should read it anyway. Also watch "All Souls" when you feel sufficiently recovered from this episode.
Fanfiction: CC/Emily inspired hundreds of stories. These are my favorites.
Arizona Highways by
fialka. My candidate for best TXF novel. Ends in MSR if that matters to you.
Iolokus by
rivkat and
mustangsally78.
The Mill by
cofax7.
Sweet Nothings for the Numb by
amalnahurriyeh.
EDITED TO ADD:
Five Years and One Night by Shalimar. Also at Gossamer.
Soliloquy: Bill Scully by Fialka.