TONIGHT: The chilling true-crime story of a mother who vanished. What happened that night? Find out tonight on the all-new 20/20 event special at 9|8c on ABC. #ABC2020 | ABC 20/20

NEW True Crime: Why did a handsome doctor, pilot, husband – really kill his wife? The only thing more shocking may be how he tried to cover up the crime. John Quiñones reports on the murder of a prominent doctor’s wife. Watch the all-new 20/20 - Friday at 9/8c on ABC. Stream next day on Hulu. | ABC 20/20

NEW TRUE CRIME | An unsolved murder and the child who was sent to prison for it, before his conviction was overturned. Who is the killer? The stunning new 20/20 'Gone Before The Storm' premieres Friday at 9/8c on ABC, and stream on Hulu. | ABC 20/20

FINALLY, TONIGHT: Natalee Holloway | 15 years after she disappeared – stunning new details as her mother sets off on an emotional journey to the place where her daughter vanished. WATCH the new 20/20 television event tonight at 9|8c on ABC. http://abcn.ws/2OwhiUT | ABC 20/20