Selome Hailu IFC has greenlit “Sisters,” a half-hour dark comedy from Sarah Goldberg and Susan Stanley.The six-episode series follows two women (Goldberg and Stanley), one born in Canada and the other in Ireland, who discover they are half-sisters and embark on a road trip to find their alcoholic father. Goldberg and Stanley, real-life best friends, co-created the series.“Sisters” was developed by Peer Pressure, Shaftesbury, RTÉ and Declan Lowney, who is set to direct the first three episodes.