Seasons & episodes

Prominent Virginia couple found brutally murdered in their home; Detectives question daughter of couple found murdered and her boyfriend; Boyfriend, girlfriend travel to Europe during murder investigation.

"20/20" features the stars of the most influential romantic movies, takes viewers behind the scenes and dissects the most memorable moments from these classics. The special will feature interviews with actress Katherine Heigl, from "27 Dresses"; Nia Vardalos and Andrea Martin from "My Big Fat Greek Wedding"; and Dakota Johnson and Jamie Dornan from the "Fifty Shades" films.

Actors Roseanne Barr, John Goodman, Laurie Metcalf, Sara Gilbert, Lecy Goranson, Michael Fishman, and Sarah Chalke reveal behind-the-scenes moments, memories, and discuss the show's legacy.

A fatal kayaking trip is the focus of an interview with Angelika Graswald, a woman who was convicted of involuntarily killing her fiancé, after the kayak sank on the Hudson River in New York in 2015.

A son orchestrates a murder-for-hire plot that injures him and kills family members; the son is convicted of first-degree murder and sentenced to death; the son's father pleas for the death sentence to be commuted to life in prison.

Woman dies mysteriously in historic California mansion; Dead woman's family refuses to believe she committed suicide; Nearly seven years after mysterious death, civil trial begins.

Sharon Morello and Howard Burack were both adopted as babies, and they each later learned they had an identical sibling from whom they were separated as infants.

Two women suspect they may be the five-month-old infant who disappeared from her crib over twenty years ago, and DNA testing is used to determine if one of them is the missing baby.

ABC News' Amy Robach sits down for the first interview with Denise Huskins and Aaron Quinn, center of the so-called "Gone Girl" case, whose kidnapping was initially dismissed by authorities as a hoax.

Recently divorced woman starts dating man with a troubled past; Man, girlfriend allegedly behind murder-for-hire plot to kill their exes; Arrested for alleged murder-for-hire of their respective exes.

A mother opens up about her fight to prove her son is innocent of murdering Mark Fisher, a 19-year-old college sophomore on the dean' list, viciously beaten and shot five times on Oct. 12, 2003.

Strikes will establish a strong deterrent of chemical weapons: Trump; Pentagon officials remark on strikes in Syria.

The event America's been waiting for - James Comey - his first interview since being fired by President Trump.

Sexual harassment in the workplace and potential solutions.

Woman recalls being branded as part of joining secret society; What former NXIVM members say about Keith Raniere's attitude toward women; How 'Smallville' actress became involved with NXIVM.

Authorities use DNA to find Joseph DeAngelo, the suspected Golden State Killer; interviews with attack survivors and others close to the case.

A midflight explosion forces pilot Tammie Jo Shults to make an emergency landing in Philadelphia; interviews with passengers on the flight and those that know the heroic pilot.

Memorable moments from Prince Harry and Meghan Markle's wedding, including the vows, reception, fashion, and the royal couple's first public appearance as man and wife.

A behind-the-scenes look at summer blockbusters; the 25th anniversary of "Jurassic Park"; "Animal House" cast reunion.

Reports on ankle bracelet monitoring failures and murders committed by people ordered to wear them.

Woman's sudden death raises family's suspicions; Sheriff acknowledges missteps in handling dead woman's case.

Mom discovers daughter brutally attacked by man with shovel; Attack survivor undergoes hypnosis to remember details about assault; DNA match links man to near-fatal shovel attack.

When a woman secretly records her husband's affair, she snaps and kills his girlfriend and herself.

Drug Enforcement Administration (DEA) agents Eric Triana and James Mannick and NYPD detective Danny Politowski help carry out a sting operation where women secretly drug and rob wealthy men; interviews with Jennifer Lopez and Cardi B of "Hustlers."