Few cable networks have stayed as true to their initial missions, over the course of their corporate and programming lifetimes, at TCM. Well, ESPN and C-SPAN, maybe. But every time TCM dares to present a silent movie in prime time, I’m impressed both by the purity of the network, and the obvious respect it has for its audience. Tonight’s TCM prime-time schedule begins with Why Worry?, a Harold Lloyd charmer from 1923, in which he plays an American inadvertently caught up in a tropical revolution. Think of it as a sort of grandfather of Woody Allen’s Bananas – and enjoy.