THE return of the chilling Welsh TV crime drama Hidden features Anglesey actor Sion Eifion.

The hit show was filmed around Snowdonia, the Menai Strait, Bangor, Caernarfon, the Crimea Pass and Trawsfynydd.

The six part second series, currently underway on BBC One Wales, sees the return of DCI Cadi John (Sian Reese-Williams) and DS Owen Vaughan (Siôn Alun Davies). When the brutal murder of an ex-teacher is discovered Cadi leads an investigation in the slate mountains of Blaenau Ffestiniog. As the investigation unravels three friends (Mia; Annes Elwy, Connor; Steffan Cennydd and Lee; Siôn Eifion) have blood on their hands - but there is nowhere to hide.

Here Sion talks about himself and the series in a Q&A session:

Can you tell us a bit more about yourself?

I’m originally from Anglesey in north Wales and I started acting professionally when I was about eight years old. I ended up eventually on a soap called Rownd a Rownd. I was on that until I left school. I then studied at LAMDA in London for four years. Hidden was my second TV job since leaving and it definitely felt like a step up. There were more crew on set than I was used to and also the character itself was very well written and had a lot of layers to it so I really enjoyed it.

Your character Lee is new to the series, can you describe him?

Lee craves power, but, unfortunately for him, he doesn’t have any. He has nothing to lose and anywhere he can find power he will take it, and he’s easily led. It's a dangerous cocktail.

What drew you to work on Hidden?

The script was outstanding. I read it and I just thought ‘I’ve got to get this part’.

Lee is very different to who I am, so it’s always fun to play those characters. I enjoyed the first series as well and it was something on my radar to work on.

How did you prepare for the fight scenes?

I drank a lot of water, did plenty of stretches and stuffed my face with food! It’s just a very physical and tiring day because those fight scenes may only last a couple of seconds on screen but it’s actually a whole day of filming and wrestling on the floor. I was a bit sore on a couple of occasions and needed a massage!

What was it like working with Annes Elwy and Steffan Cennydd?

The on-screen relationship never affected our off-air relationship and we’re very close friends. There was a lot of serious stuff happening but we made sure that we had a lot of fun and laughter between takes. You kind of need to with a serious drama or your life becomes too strenuous for five months. We got to know each other well, hopefully I’ll work with them again.

Tell us about the locations.

I’ve heard some people refer to the scenery as a character in itself. I would agree with that, especially in Blaenau where you have a town surrounded by slate. They took advantage of that and it’s almost like the town is hidden away from the rest of the world. It’s quite comforting being in that area.

I’m from Anglesey, not too far away, so it felt familiar, it felt like home. It’s also nice to see the beauty of north Wales getting recognition and seeing it on the screen.