A picture of "Poldark" TV series cast members Harry Richardson (Drake), Ellise Chappell (Morwena) and Tom York (Sam). Poldark/ Facebook

Tom York (Sam Carne) and Amelia Clarkson (Rosina Hoblyn) were spotted on the set of “Poldark,” filming for season 4. Lead cast member Aidan Turner (Ross) was also present.

Leaked on-set pictures posted on the Daily Mail shows York and Clarkson filming at Porthgwarra Cove near Land's End. The two actors can be seen covering their costumes with long, red overcoats. Fellow cast member Harry Richardson (Drake Carne) joined the shoot later, and he was seen chatting with co-stars between filming breaks.

The padded overcoat was apparently necessary to shield the actors from the cold winds of autumn. Readers should note that sometimes, the actors are made to wear long coats to hide the costumes, but that may not be the case here.

Filming appears to have gone smoothly, with cast members gleefully discussing scenes before filming. Only York, Richardson and Clarkson appear to be involved in the filming at this location when the pictures were taken.

Turner was also spotted on location close to where his fellow cast members. The lead actor was reportedly filming a scene in which he rides his horse. It isn’t clear if any of the other cast were involved in this scene.

Filming of the series has been ongoing for a while now, and there have been many leaks from the sets. The pictures that have surfaced online do not give away the plot of the show, however.

“Poldark” season 4 is set to air in the summer of 2018. The producers are yet to announce an exact release date for different countries. The fans in the US are yet to see the third season, which will air soon.