Samantha Wheeler is an unwelcome new partner at Specter Litt in Season 8 of “Suits.”In the just-released promo for the new season of the USA Network series, Samantha (Katherine Heigl) meddles in Harvey’s (Gabriel Macht) business affairs, much to his annoyance. “I don’t need your help. Stay away from my clients,” Harvey bluntly tells Samantha in the video.