 David McCulloughSelf - Host | Self - Host |
| WWilliam Stanley MerwinSelf - Narrator (voice) | Self - Narrator (voice) |
| TTom WickerSelf - Journalist | Self - Journalist |
| AAlbert EiseleSelf - Biographer | Self - Biographer |
| TTed Van DykSelf - Humphrey Staff | Self - Humphrey Staff |
| MMarilyn KatzSelf - Antiwar Activist | Self - Antiwar Activist |
 David DellingerSelf - Antiwar Activist | Self - Antiwar Activist |
| DDavid FarberSelf - Historian | Self - Historian |
| RRoger WilkinsSelf - US Justice Department | Self - US Justice Department |
| JJoel WeismanSelf - Chicago Journalist | Self - Chicago Journalist |
| DDavid StahlSelf - Chicago Deputy Mayor | Self - Chicago Deputy Mayor |
| AAbe PeckSelf - Anitwar Activist | Self - Anitwar Activist |
| TThomas ForanSelf - US Attorney, Illinois | Self - US Attorney, Illinois |
| RRennie DavisSelf - Antiwar Activist | Self - Antiwar Activist |
| RRichard SamuelSelf - McCarthy Delegate | Self - McCarthy Delegate |
| WWilliam FrapollySelf - Undercover Police | Self - Undercover Police |
| MMike SpiegelSelf - Antiwar Activist | Self - Antiwar Activist |
| FFrank SullivanSelf - Police Spokesman | Self - Police Spokesman |
 Tom HaydenSelf - Antiwar Activist | Self - Antiwar Activist |
| RReuven FrankSelf - NBC News | Self - NBC News |
| DDavid GinsburgSelf - Humphrey Staff | Self - Humphrey Staff |
| EEdward CollinsSelf - Chicago Police | Self - Chicago Police |
 Bill AyersSelf - Antiwar Activist | Self - Antiwar Activist |
| JJean WallinSelf - McCarthy Delegate | Self - McCarthy Delegate |
| JJoseph AliotoSelf - Mayor, San Francisco (archive footage) | Self - Mayor, San Francisco (archive footage) |
 Richard J. DaleySelf (archive footage) | Self (archive footage) |
| WWayne HaysSelf - Representative, Ohio (archive footage) | Self - Representative, Ohio (archive footage) |
 Hubert H. HumphreySelf (archive footage) | Self (archive footage) |
| EEugene McCarthySelf (archive footage) | Self (archive footage) |
 Pierre SalingerSelf - Convention Speaker (archive footage) | Self - Convention Speaker (archive footage) |