Guest Stars Josh Stewart as Sanford Conover Lili Taylor as Mary Todd Lincoln Spencer Treat Clark as Lewis Powell Anne Dudek as Ellen Stanton Larry Pine as William Henry Seward Betty Gabriel as Elizabeth "Lizzie" Keckley C.J. Hoff as Louis Weichman Daniel Croix as Joseph "Peanuts" Burroughs Joshua Mikel as John Surratt Jr. Co Starring Antonio J. Bell as Milo Simms Carrie Lazar as Mrs. Mary Surratt Kevin Patrick Murphy as Lieutenant Luther Baker Maxwell Korn as Robert Lincoln Walker Babington as Edward "Ned" Spangler Tommie Turvey as George Atzerodt Roger Payano as Oswell Swann Chip Lane as Chief Security Guard Don A. King as Southern Congressman #1 Jeronimo Spinx as Uncle Henry Julie Ivey as Miss Rachel Tom McCafferty as Mr. Gorsuch Elizabeth June as Mary Simms' Grandmother Chris Gerard as William Parker Glenn H. Allen as White Neighbor Brielle Oliver as Young Mary Simms Sam Balas as Tom Gorsuch, Jr. Stephanie McInnis as Mary Simms' Older Aunt Andre Haskett as Mary Simms' Male Cousin Shawn Randall Howard as Stable Manager