With the first episode reaching a U.K. audience of 4.5 million after 26 days, the spy thriller — starring Eddie Redmayne and Lashana Lynch — is the most popular new series to ever launch on Sky.

And there’s more! A new cast will fill the old roles made famous by the likes of Daniel Radcliffe, Rupert Grint, Emma Watson, ...

Who better to weigh in on Harry Potter casting rumors than Ralph Fiennes? Fiennes, who played Voldemort in the Harry Potter ...