Insight
Ring Of Fire
Unholy Alliance
I'll Be Watching You
Unsoiled Sovereignty
Modus Operandi
Night Dreams
Cruel And Unusual
Sorcerer's Apprentice
Shattered Silence
Doppelganger
Learning From The Masters
The House That Jack Built
Shadow Of Angels
Film At Eleven
Crisis
Blue Highway
FTX: Field Training Exercise
Into The Abyss
Venom

First season
Second season
Third season
Fourth season
Episode guide main page

Doppelganger
Sam is confronted by Arthur deRhodes, the first man she ever shot when he asks for her help. A victim with a similar murder method has been discovered in the ward for the criminally insane where he is locked up. Jack continues his efforts of isolating Sam by attacking Angel.

Guest stars
Special guest star: Edward Albert (Arthur deRhodes), Barry Cullison, Peter Dennis, Steve Larson, Michael Ensign, Mike Kennedy.

Recurring characters
Jack.

Opening credits
Co-producer:  John Forrest Niss
Produced by:  Anthony Santa Croce
Supervising producer:  George Geiger
Supervising producer:  Cynthia Saunders
Creative consultant:  Ken Solarz
Executive consultant:  Lawrence Hertzog
Written by:  Bob Lowry
Directed by:  John Patterson

Memorable lines
Angel: "You're unbelievable, you know that? You can remember what color socks some killer wore a hundred years ago but you can not remember a single conversation that took place yesterday."
Sam: "No, that's not true, I did remember, I just forgot."

George: "Okay, I suppose... that I could, you know, hack into an intelligence satellite. But it's curtains for me if I get caught."
Sam: "Well, don't get caught. Thanks, George."

Bailey: "Does he have a cabin by the lake?"
George: "It's never enough, is it? After I find it you're gonna want me mow your lawn, paint your garage, huh?"

Bailey: "Where did you get this?"
George: "I really can't say."
Bailey: "George."
George: "The, um, the... White House."

Bailey: "I want the exact coordinates of that cabin within five hundred feet."
George: "Okay. How do you want me to do that?"
Bailey: "Call the President."

Trivia
The tango Jack listens to while planning his attack on Angel is "Jalousie" (Danish for "jealousy") by the composer Jacob Gade. "Jalousie" was first performed in 1925 in Copenhagen, Denmark.
The footage of Sam, Bailey, John and company arriving to the St. Jude retirement home at the end of the episode was also seen in the second season episode "Dying To Live". (Check out Sam's hair, John's clothes, Bailey's hat!)