BBC America has acquired two new series, “Hotel Babylon” and “Torchwood,” as well as second seasons of dramas “Life on Mars” and “Vincent.”Inspired by Imogen Edwards-Jones’ book, “Hotel Babylon” is a drama about the staff of a five-star hotel. Skein preems in August. “Torchwood” and “Vincent” will debut in September. Created by Russell T. Davies, “Torchwood” is a sci-fi series about a team of investigators who use alien technology to solve crime; crime drama “Vincent” stars Ray Winstone as a private investigator. A premiere date has not been determined for “Life on Mars,” a drama about a modern-day cop transported back to the ’70s to solve a crime.