Two retired F.B.I. agents said today that they had rejected advisory roles on the disputed ABC mini-series, “The Path to 9/11,” because of concerns about the program’s accuracy.

One of the agents, Thomas E. Nicoletti, was hired by the producers of the mini-series in July 2005 to oversee its technical accuracy, but left after less than a month because of scenes he believed were misleading or just false.

“There were some of the scenes that were total fiction,” said Mr. Nicoletti, who served as a supervisory special agent and a member of the joint terrorism task force before retiring in 2003. “I told them unless they were changing this, I could not have my name associated with it.”

Chief among Mr. Nicoletti’s concerns were scenes that placed people at places they had not been present at and scenes that depicted events that were out of chronological order.