In March 1986, at the behest of CIA Director William J. Casey, Cave joined the unofficial, but presidentially approved, covert operation to provide American-made missiles to the Islamic Republic of Iran that constituted part of the Iran-Contra affair. The weapons sales were part of a deal that was supposed to include the release of several American citizens being held hostage in Lebanon by Hezbollah, a close ally of Iran. Cave was one of the participants who hoped that the operation would also eventually lead to improved U.S. and Israeli political relations with the Iranian regime. Over several months, he served as an Iran expert, Persian-English interpreter, and sometime negotiator, in numerous meetings with Iranian representatives in Europe and Washington, D.C. In May 1986 he was part of the delegation that traveled clandestinely to Tehran in hopes of meeting with senior Iranian officials. In November 1986, an exposé of the Tehran mission in a Lebanese news magazine brought the secret deals to an abrupt halt. In the aftermath of the scandal, in-depth probes by Congress and an Office of Independent Counsel focused intently on Cave's role but generally concluded he had not played a fundamental role. He had been brought in at the CIA director's insistence, had not been aware of all of the plans or tactics of the main actors (such as manipulating weapons pricing), and had objected to the involvement of Iranian arms dealer Manucher Ghorbanifar. His depositions to congressional investigators and testimony in legal proceedings, such as at the trial of senior CIA official
Clair George, provided important factual information about the operations and the roles of various NSC, CIA, and other players. == Published novel ==