The prison interior scenes were filmed at ARIA FILM STUDIOS and also Coleg Menai, both in Llangefni, Ynys Môn.
'Bariau' is Welsh for 'Behind Bars'. It is also a play on the name of the character Barry Hardy.
Although not officially a spin-off of Rownd a Rownd (1995), Gwion Tegid plays the same character, Barry Hardy, on both shows.