Suzan and Michael Carson: Two lost and lonely hippies fall in love, deciding to turn their backs on the modern world for a life of hallucinogenic drugs, and a multi-state murder spree. (S2 Ep10)
Cynthia Coffman and James Marlow: A pair of sociopaths fall in love after being in the same jail - and their obsession with one another is only matched by their addiction for mayhem. (S2 Ep9)
Dawn Godman and Taylor Helzer: Inspired by a zealous prophet, two lovers set out on a deadly mission to prove their devotion to each other and their bizarre religion. (S4 Ep10)
Donna and Jason Slaughter: A married couple's twisted scheme is exposed when they conspire to murder the husband's secret lover. But was this a crime of passion or a merciless plot for cash? (S4 Ep8)
Dawn Godman and Taylor Helzer: Inspired by a zealous prophet, two lovers set out on a deadly mission to prove their devotion to each other and their bizarre religion. (S4 Ep10)
Donna and Jason Slaughter: A married couple's twisted scheme is exposed when they conspire to murder the husband's secret lover. But was this a crime of passion or a merciless plot for cash? (S4 Ep8)
Charlene and Gerald Gallego: When a sexually charged love affair spins out of control, two lovers go to extreme lengths to satisfy their desires and the consequences are deadly. (S4 Ep6)
Sara Aldrete and Adolfo Constanzo: In the Mexican desert, two cult leaders' passion for torture and human sacrifice is exposed when they pick the wrong victim. (S4 Ep4)
Michelle Michaud and James Daveggio: A couple's dark sexual cravings lead to a series of assaults that only become more gruesome as things heat up. (S4 Ep3)
Alicia Woodward and John Esposito: A summer romance takes a dark turn when two outcast teens turn a cross-country joy ride into a full-on killing spree. (S2 Ep8)
Cindy Hendy and David Parker Ray: An escaped victim of the famous Toy Box Killings exposes a couple whose extreme tastes for sadism and death would shock the nation. (S2 Ep7)
Tiffany Cole and Michael Jackson: When two hard-partying lovers fall on hard times, they turn to an elderly couple for help, but the couple's generosity is repaid with cold-blooded betrayal. (S2 Ep6)
Elizabeth Haysom and Jens Soering: A socialite and the son of a German diplomat find love on a college campus, but when friends challenge their love, they contrive a deadly scheme. (S2 Ep5)
Rachel Cumberland and John Williams: A couple travelling the highways of the USA are hiding a dark secret: they're road-bound maniacs with unquenchable appetites for sex, drugs and murder. (S2 Ep4)
Charlene and Gerald Gallego: When a sexually charged love affair spins out of control, two lovers go to extreme lengths to satisfy their desires and the consequences are deadly. (S4 Ep6)
Sara Aldrete and Adolfo Constanzo: In the Mexican desert, two cult leaders' passion for torture and human sacrifice is exposed when they pick the wrong victim. (S4 Ep4)
Michelle Michaud and James Daveggio: A couple's dark sexual cravings lead to a series of assaults that only become more gruesome as things heat up. (S4 Ep3)
Amanda and Grant Hayes: A turbulent love triangle takes a deadly turn - leaving behind a dismembered body, and a killer couple pointing the finger at each other in the aftermath. (S4 Ep1)
Hunt and Fotopoulos: After a murder-for-hire goes dreadfully awry, surprise video evidence may help police prove just how far this couple is willing to go to rule the Daytona empire. (S3 Ep8)
Mee and Newton: A bizarre affliction gives a teen her 15 minutes of fame. But when the limelight fades she finds a new rush, using social networking to lure a man to his death. (S3 Ep7)
Coty Martinez and Jeremy Brooks: A modern-day Bonnie and Clyde embark on a two-month, multi-state crime wave that sends shockwaves across the country. (S2 Ep2)
Tina Loesh and Skye Hanson: A hot jailhouse romance between a woman and her cellmate receives an ice-cold reception outside prison walls, and the fallout is deadly. (S2 Ep1)
Suzan and Michael Carson: Two lost and lonely hippies fall in love, deciding to turn their backs on the modern world for a life of hallucinogenic drugs, and a multi-state murder spree. (S2 Ep10)
Cynthia Coffman and James Marlow: A pair of sociopaths fall in love after being in the same jail - and their obsession with one another is only matched by their addiction for mayhem. (S2 Ep9)
Alicia Woodward and John Esposito: A summer romance takes a dark turn when two outcast teens turn a cross-country joy ride into a full-on killing spree. (S2 Ep8)
Cindy Hendy and David Parker Ray: An escaped victim of the famous Toy Box Killings exposes a couple whose extreme tastes for sadism and death would shock the nation. (S2 Ep7)
Amanda and Grant Hayes: A turbulent love triangle takes a deadly turn - leaving behind a dismembered body, and a killer couple pointing the finger at each other in the aftermath. (S4 Ep1)
Hunt and Fotopoulos: After a murder-for-hire goes dreadfully awry, surprise video evidence may help police prove just how far this couple is willing to go to rule the Daytona empire. (S3 Ep8)
Mee and Newton: A bizarre affliction gives a teen her 15 minutes of fame. But when the limelight fades she finds a new rush, using social networking to lure a man to his death. (S3 Ep7)
George and Cassimy: An extramarital affair heats up when two lovers conspire to kill one of their spouses in order to avoid losing everything in a divorce. (S3 Ep5)
Andrew and Pavatt: Two Sunday school teachers become cold-blooded killers when they conspire to murder one of their spouses for insurance money. (S3 Ep2)
George and Cassimy: An extramarital affair heats up when two lovers conspire to kill one of their spouses in order to avoid losing everything in a divorce. (S3 Ep5)