Laura Keene was British, but as portrayed by Cynthia Thomas, she has no trace of an accent.
Lincoln was shirtless when he was being carried by the doctors, but in real life, he was only wearing a shirt that was neatly in place as well as his coat, which he either wore or was placed on top.
Laura Keene was in the box when Dr Leale arrives at the same time, yet, in real life, she arrived later.
At 15:30 Basehart says "On April 14, the nation begins its fifth day of peace." This is an inaccurate statement. Johnston did not surrender to Sherman until April 26, 1865, at Bennett Place, North Carolina. Forest surrendered May 9, at Gainsville, Alabama, while other smaller Confederate forces east of the Mississippi continued to surrender in May and June. West of the Mississippi the war continued into May, when the last land battle was fought at Palmito Ranch (May 13), near Brownsville, Texas. Over the next 6 weeks, the remaining Confederate forces surrendered In Louisiana (Kirby Smith: May 26), and Indian Territory (Stand Watie: June 23). So, there were still armies throughout the South that continued to fight for another month and would finally surrender over the next 10 weeks.