The recurring Syfy marathons of Rod Serling’s The Twilight Zone are more than just easy programming filler for occasional holidays. They’re also, these days, the torch that most keeps the memory and reputation of that classic TV series alive, at least for a new generation of viewers. So, today, revel in the Zone. Watch some of the iconic episodes, like “The Monsters Are Due on Maple Street” (3:30 p.m. ET), which we still show in class when teaching early TV history at Rowan University --  but also look out for less famous but still enjoyable episodes, such as “Of Late I Think of Cliffordville” (11:30 a.m. ET), in which a rich businessman (Albert Salmi) pays for a visit to his nostalgic past, thanks to a very devilish travel agent (Julie Newmar, pictured).