 The episode was filmed between October and November 2007 in the sixth production block of the series , alongside " Exit Wounds " . The sequence of Jack , Ianto and Owen leaving for Gwen 's wedding was recorded at Roald Dahl Plass on 25 October 2007 . A number of locations were used for the wedding venue . Producer Richard Stokes notes that " it felt like we were organising a real wedding but one that was being shot in about five different venues " . Director Ashley Way states that in directing the wedding scenes , the production team had to make sure that the colour scheme co @-@ ordinated in regards to aspects like the bridesmaids costumes and the flower patterns . Costume designer Ray Holman experienced difficulty sourcing a maternity wedding dress to accommodate the nine @-@ month baby bump worn by Eve Myles . He remarks that in trying to source three such dresses from bridal shops in Cardiff he was regarded " as if I was the biggest sinner in the world " and ended up designing the dress worn by Gwen himself . 
