Original "Harvest of Shame" documentary (not undercover but highly influential in subsequent efforts that involved the 'worked as' technique) and a follow-up fifty years later, both by CBS News.
"Harvest of Shame is considered one of the most important documentaries ever made. It chronicles the lives of migrant workers. Fifty years later, another CBS Reporter revisited the subject.
Media History
The reporting was intended for these media types:
Television