Finding Your Roots is a TV show with host Henry Louis Gates Jr. and has been on air for 2 Seasons. The premise is similar to Who Do You Think You Are? and traces the roots and family histories of celebrity guests.
When an episode featuring Ben Affleck aired last October it was later learned (through hacked emails) that Affleck had told Gates he did not want mention made of his slave owning ancestors. Gates and the show's producer removed all mention.
When the emails surfaced there was a huge outcry from fans and genealogists alike, most of whom were dismayed at the editorial liberties taken by the show to hush up the past and hide the facts.
At the time Gates defended the decision to not air Affleck's ancestors' slave owning deeds by saying that the producers found "more interesting" ancestors to talk about.
After an investigation, PBS found that "... producers violated network standards
by letting Mr. Affleck have “improper influence” and “by failing to
inform PBS or WNET of Mr. Affleck’s efforts to affect program content.”
Before Season 3 airs, PBS plans on making staff changes and has not yet reached a decision as to whether or not there will be a fourth Season.
Read more in the NY Times at Citing Ben Affleck’s ‘Improper Influence,’ PBS Suspends ‘Finding Your Roots’