Dateline NBC - Season 18

The doctors of Grey Sloan Memorial Hospital deal with life-or-death consequences on a daily basis -- it's in one another that they find comfort, friendship and, at times, more than friendship. Together they're discovering that neither medicine nor relationships can be defined in black and white. Real life only comes in shades of grey.

The most miserable person on Earth must save the world from happiness.

Greg Davies is the Taskmaster who, with the help of his right-hand man, Alex, sets out to test the wiles, wit and wisdom of five hyper competitive comedians through a series of ingenious challenges. With the chance to be crowned show champion, rivalry amongst the comedians is encouraged, dodgy tactics rewarded and bribes accepted.

The First 48 follows detectives from around the country during these first critical hours as they race against time to find the suspect. Gritty and fast-paced, it takes viewers behind the scenes of real-life investigations with unprecedented access to crime scenes, autopsies, forensic processing, and interrogations.

In the criminal justice system, sexually-based offenses are considered especially heinous. In New York City, the dedicated detectives who investigate these vicious felonies are members of an elite squad known as the Special Victims Unit. These are their stories.