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Mystery Apes of the Congo: A Chimp in Trouble

"On Assignment," a special six-episode series from "Dateline NBC." Each episode contains powerful, in-depth reports from the correspondents of NBC News. The series premieres Sunday, May 8th at 7/6c on NBC.

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Mystery Apes of the Congo: A Chimp in Trouble DATELINE SUNDAY PREVIEW: Silent No More FULL EPISODE: A Shot in the Dark A Shot in the Dark, Part 2 A Shot in the Dark, Part 3 A Shot in the Dark, Part 4 A Shot in the Dark, Part 5 A Shot in the Dark, Part 6 A Shot in the Dark, Part 7 A Shot in the Dark, Part 8 A Shot in the Dark, Part 9 A Shot in the Dark, Part 10 A Shot in the Dark, Part 11 A Shot in the Dark, Part 12 Lucinda The Lip-Reader How Mock Trials Altered Cara Ryan’s Defense Remembering J.J. Rush FULL EPISODE: The Last Day The Last Day, Part 2 The Last Day, Part 3 The Last Day, Part 4 The Last Day, Part 5 The Last Day, Part 6 The Last Day, Part 7 The Last Day, Part 8 The Last Day, Part 9 The Last Day, Part 10 The Last Day, Part 11 The Last Day, Part 12 Remembering Erin A Prosecutor’s Moment FULL EPISODE: At the Bottom of the Stairs At the Bottom of the Stairs, Part 2 At the Bottom of the Stairs, Part 3 At the Bottom of the Stairs, Part 4 At the Bottom of the Stairs, Part 5 At the Bottom of the Stairs, Part 6 The Jury in the Rintala Case Speak Out Remembering Annamarie FULL EPISODE: Secrets on Hot Springs Drive Secrets on Hot Springs Drive, Part 2 Secrets on Hot Springs Drive, Part 3 Secrets on Hot Springs Drive, Part 4 Secrets on Hot Springs Drive, Part 5 Secrets on Hot Springs Drive, Part 6 Secrets on Hot Springs Drive, Part 7 Secrets on Hot Springs Drive, Part 8 Secrets on Hot Springs Drive, Part 9 Secrets on Hot Springs Drive, Part 10 Secrets on Hot Springs Drive, Part 11 Secrets on Hot Springs Drive, Part 12 'I didn't think he would do it' FULL EPISODE: The Summer of Manson The Summer of Manson, Part 2 The Summer of Manson, Part 3 The Summer of Manson, Part 4 The Summer of Manson, Part 5 The Summer of Manson, Part 6 The Manson Girl Everyone Saw But Nobody Knew What Secrets Does Manson Family Hideout Barker Ranch Hold? Where Are the Manson Family Members Now?

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Mystery Apes of the Congo: A Chimp in Trouble

Past Seasons

Dateline in-depth

Missing in america

Georgia mother of three vanishes from home

South Carolina mom found safe less than two weeks after disappearing

South Carolina mom found safe less than two weeks after disappearing

Mother of three missing from Lexington, South Carolina

Arkansas father still missing after disappearing from family residence in July

Missing person case now a homicide investigation after actress's remains identified

Five MS-13 gang members arrested for 10 murders in Las Vegas

Cold case spotlight

Kentucky woman last seen walking her dog still missing 22 years later

Georgia teen missing for two years returns home after living with 'a group of people from the Woodstock era'

Georgia teen missing for two years returns home after living with 'a group of people from the Woodstock era'

Single mother of Canadian 16-year-old Mekayla Bali still looking for her daughter on the two-year anniversary of her disappearance

Yakima Police still looking for leads in 27-year-old missing persons case of Susan Marable

Family desperate for answers in missing persons case that was not properly investigated for nearly 20 years

California parents plead for information on daughter's 2015 disappearance

Featured

DATELINE FRIDAY SNEAK PEEK: Deadly Circumstances

Georgia teen missing for two years returns home after living with 'a group of people from the Woodstock era'

Georgia teen missing for two years returns home after living with 'a group of people from the Woodstock era'

Kentucky woman last seen walking her dog still missing 22 years later

On Assignment

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Kentucky woman last seen walking her dog still missing 22 years later

Temple suspends frat in sexual assault investigation

L.A. cop faces murder charges after fiery crash

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Grandmother suspected in two murders is nabbed in Texas

Investigations

Cohen negotiated settlement between GOP fundraiser, former Playmate

Federal authorities seize classified advertising site Backpage

Missing person case now a homicide investigation after actress's remains identified

Police say Russian ex-spy, daughter were likely poisoned at their front door

Five MS-13 gang members arrested for 10 murders in Las Vegas

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