- On the Case With Paula Zahn
TV-14 | Law/Documentary
- OJ Simpson: The Crimes and Punishment
TV-14 | Documentary/Crime
- On Tour With Asperger's Are Us
TV-14 | Comedy/Documentary
- O.J.: Guilty in Vegas
TV-14 | Documentary/Crime
- Once Upon a Time in Space
TV-14 | Science/Documentary
- Original Gangsters With Sean Bean
TV-14 | History/Documentary
- One & Done: Ben Simmons
TV-14 | Documentary/Basketball
- One Nation Under Stress
TV-14 | Health/Documentary
- One Survivor Remembers
TV-14 | Documentary/Special
- Oklahoma City Bombing: As We Watched
TV-14 | History/Documentary
- Over My Dead Body
TV-14 | Documentary/Crime
- Obama: In Pursuit of a More Perfect Union
TV-14 | Documentary/Biography
- Our Towns
TV-14 | Documentary/Special
- Obsession: Dark Desires
TV-14 | Documentary/Crime
- O.J. & Nicole: An American Tragedy
TV-14 | Documentary/Crime
- Origins of Hip-Hop
TV-14 | Documentary/Music
- One Punk Under God
TV-14 | Religious/Documentary
- Our Time
TV-14 | Documentary
- Outback Truckers
TV-14 | Documentary
- Out of the Cradle: Behind the Scenes
NR | Documentary/Special
- Of the People: Women on the Civil Rights Movement
NR | Documentary/Special
- Our Sacred Honor
NR | Politics/Documentary
- Operation Undercover: Guns & Drugs in Carolina
NR | Documentary/Crime
- Our America: Fifty/50
NR | Documentary/Special
- Out of Order
NR | Documentary/Special
- Once Upon a Time in Northern Ireland
NR | Documentary
- Opeka
NR | Documentary/Special
- On the Trail of UFOs
NR | Documentary
- Outrageous 911
NR | Documentary
- Outback Adventures
NR | Animals/Travel
- Oklahoma Military Academy
NR | Documentary/Special
- Outdoor Idaho
NR | Outdoors/Documentary
- Out of the Cradle
NR | Documentary/Special
- The Origami Code
NR | Science/Documentary
- Operation Torch
NR | Documentary/War
- Over the Edge
NR | Documentary/Surfing
- One to One: John & Yoko
NR | Documentary/Biography
- One October: A Nightmare in Las Vegas
NR | Documentary/Special
- One With the Water
NR | Documentary/Surfing
- On the Trail of Bigfoot: The Legend
NR | Documentary/Special
- o Marisquiño 2021
NR | Multi-sport event/Documentary
- Our Favorite Things About Grantchester
NR | Entertainment/Documentary
- Our Neighbors In Nehou
NR | Documentary/Special
- Otterly Incredible
NR | Documentary/Special
- One Nation Under Dog
NR | Documentary/Special
- The Oland Murder
NR | Documentary/Crime
- Operation Valkyrie: The Plot to Kill Hitler
NR | History/Documentary
- Over the Edge: Steep Creek Kayaking
NR | Documentary/Special
- Ocean Warriors
NR | Animals/Documentary
- The Oxygen Experiment: Hypoxia
NR | Documentary/Special
- Old World Homes
NR | Documentary/House/garden
- On the Trail of UFOs: Night Visitors
NR | Science/Science fiction
- Operation Lost Boy
NR | Miniseries/Documentary
- Ocean Resurrection
NR | Documentary/Nature
- OG Stories
NR | Documentary