This excellent new documentary import continues tonight with its second installment, a show with a lengthy title but a narrow focus: 1918-28 – The Triumph of American Film and the First of Its Rebels. It covers the ascendance of Hollywood, its first early stars – including the silent-comedy geniuses Charlie Chaplin and Buster Keaton – and the introduction of sound. And arrive early and stay late, because the night’s TCM lineup also includes Buster Keaton’s hilarious short One Week at 8 p.m. ET, and, at 4:15 a.m. ET, Harold Lloyd's brilliant, full-length Safety Last! feature (pictured) from 1923. My film students, if they watch tonight’s TCM lineup, will be cheating by “reading ahead” – but it’s the one type of cheating I actively encourage.