Season 1 The epic and stranger-than-fiction true story of James Garfield, reluctant 20th president of the United States, and his greatest admirer Charles Guiteau — the man who would come to kill him. Details Casts Season Lists Episode Lists Title Season 1 Genres Drama Crime Air Date Episode Runtime 00 Hours 00 Minutes Season Number 1 Episode Count On Season 1 1 Production Companies Bighead Littlehead Michael Shannon... James Garfield... Matthew Macfadyen... Charles Guiteau... Nick Offerman... Chester A. Arthur... Betty Gilpin... Crete Garfield... Bradley Whitford... James Blaine... Shea Whigham... Roscoe Conkling... Season 1 1 Episode(s) Episode 1 Episode 1...