undercover

The BBC had placed an undercover reporter within the UK's largest police force.

Among the officers filmed by our undercover reporter were:

Detectives put him in a cell with an undercover informant, who posed as a fellow 18th Street member.

Of all the things I tried to prepare for before going undercover I hadn't anticipated forming genuine bonds with the people who lived in there.

If that premise sounds familiar, it’s because the series is based on a viral sketch featuring former NFL all-star Eli Manning, who goes undercover for walk-on quarterback tryouts at Penn State.