48 Hours on ID

"Strange" doesn't seem to adequately describe some of the addictive behaviors profiled on this series. "Dangerous," even "life-threatening," come much closer. Each half-hour episode features two adults who resort to extreme compulsions in an effort to soothe their emotional demon

Tattoo artists Ami James and Chris Nunez take you behind the scenes in their Miami, Florida, tattoo parlor. With a team of talented artists, each with their own fascinating backstory, learn how -- and why -- they create unique ink for their customers.

Astronaut Mike Massimino takes an in-depth look at the planets of the solar system, the newly discovered Planet 9, exoplanets and more.

This collection features some of the most dramatic episodes from NBC's long-running Dateline series.

An inside look at the unique world of grudge racing.

Actor Peter Stormare's personal and often humorous journey through Minnesota to learn the truth about the Kensington Runestone, a disputed proof that vikings discovered America, through meetings with scholars, skeptics and sensationalists.