Ahead of its launch, up-and-coming streaming service HBO Max has secured a key partnership with BBC Studios. The exclusive partnership sees BBC joining a bevy of WarnerMedia networks — including HBO, Warner Bros., CNN, TNT, TBS — who will all provide content to the streamer. Per a press release, the BBC deal means HBO Max is going to add hit series like Doctor Who, The Office starring Ricky Gervais, and Luther to its library of TV shows and movies. The HBO Max-BBC deal is a formidable one, giving U.S. viewers a new level of access to beloved UK …