This show leaves the impression that Andrew Johnson attempted to fire Edwin Stanton shortly after the end of the Civil War when Stanton barricades himself in the War Department. In reality, this happened nearly three years later.
The term Hail Mary is used to describe a last ditch attempt. There's no evidence that this term was commonly used in this context before Roger Staubach using it on December 28, 1975 to refer to his game-winning pass against the Minnesota Vikings.