“On Wednesday, PBS said that an investigation into the controversy showed that Mr. Affleck had exerted “improper influence” over the editorial process and that the producers of the show, Mr. Gates included, had erred by not informing the network of the actor’s “efforts to affect program content.” PBS said it would postpone the third season of the show until a fact-checker was hired and an “independent genealogist” was added to the show’s staff. PBS also will not show Mr. Affleck’s episode anymore and removed it from its online archive.”