SERIES PREMIERE: This is not a recommendation. It’s a clarification, because the title of this new nonfiction series, and the fact that it’s coming from Reelz, may understandably lead viewers to believe that Under the Influence is a new series in which show business folks talk about the art and artists inspiring them in their own creative careers. Instead, Under the Influence is a biographical tell-all series that hones in on the missteps – sex, drugs, and otherwise – that led certain celebrities to derail from their once-successful path. The opening-hour subjects are Heath Ledger and River Phoenix, which gives you the basic thrust. Next week: Lindsay Lohan and Britney Spears. Basically, Under the Influence is in the vein of VH1’s scandal-loving Behind the Music and E!’s True Hollywood Story – which means it’s a vein that, if not varicose, certainly is vericoarse.