Episode 4

20/20 continues to combine hard-hitting investigative reports, newsmaker interviews and compelling human interest and feature stories.

Retired archaeologist Judith Potts lives alone in a faded mansion in the peaceful town of Marlow, filling her time by setting crosswords for the local paper. During one of her regular wild swims in the Thames, Judith hears a gunshot coming from a neighbour's garden and believes a brutal murder has taken place.

When the police are reluctant to believe her story, Judith finds herself forming an unlikely friendship with local dog-walker and empty-nester Suzie and unfulfilled vicar's wife Becks as they start an investigation of their own. Eventually asked to assist with the official police investigation, headed by newly promoted Tanika, the women must piece together clues, grill suspect witnesses, and face down real danger as they work against the clock to stop the killer in their tracks.

Jimmy Kimmel Live features a diverse lineup of guests that include celebrities, athletes, musical acts, comedians and human-interest subjects, along with comedy bits and a house band.

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.

FBI is a fast-paced drama about the inner workings of the New York Field Office of the Federal Bureau of Investigation. These first-class agents, including Special Agent Maggie Bell and her partner, Special Agent Omar Adom 'OA' Zidan, bring all their talents, intellect and technical expertise on major cases in order to keep New York and the country safe.