Peaky Blinders star Cillian Murphy said it was "very strange" to return to the set without his co-star Helen McCrory after she passed away last year.
The 45-year-old actor described Helen, who died following a battle with cancer, as the "beating heart" of the show.
Helen, who died at her home aged 52, starred as Polly Gray in the BBC One series since it began in 2013.
