Kevin McCarthy is quite good as popular college history professor Walter Jameson, whose lectures have the distinct air and sound of authenticity to them, especially when a mysterious diary of an unknown soldier is read from the American Civil War, which arouses the suspicions of a fellow professor whose daughter he is set to marry, even though Walter's past is soon to catch up with him in a long overdue fashion... Strong and compelling(if just a bit contrived) episode takes a familiar premise and makes inspired use of it, with seldom a dull moment or misstep. Good makeup F/X too in fondly remembered entry.