The episode featured the five initial series regulars John Barrowman, Eve Myles, Burn Gorman, Naoko Mori and Gareth David Lloyd plus recurring actor Kai Owen in a central role.

The episode centres on the marriage of the alien hunter Gwen Cooper (Eve Myles) to the transport manager Rhys Williams (Kai Owen).

The episode was designed to be the most humorous of Torchwood's second series and incorporated elements of broad comedy and soap opera style storytelling to the monster of the week story.

[2] Ford was chosen to write this episode because of his own involvement as a writer on Coronation Street and executive producer Russell T Davies' view that this would enable him to handle a wedding with comedic elements.

"[5] In an early draft of the script Gwen and Rhys had their memories wiped at the end of the episode in addition to the other guests and were convinced by Jack that the wedding had been problem free.

Hughes enjoyed getting to play a "monster" for the first time in her career which involved having "fangs and claws and red eyes" and being wired up so "all this black blood can ooze out when I get shot".

[3] Kai Owen describes Thomas, Morgan and Hughes collectively with Robin Griffith (Barry Williams) as a "good old-fashioned Welsh cast who know what it's all about".

[8] Jonathan Lewis Owen was cast as Rhys' best man "Banana Boat" a character referred to sporadically since Torchwood's first series premiere "Everything Changes" (2006).

[10] Originally, the human versions of the Nostrovite shapeshifter were intended to be more monstrous but Davies felt it was important that the audience would still be able to recognise the actor underneath once the make up had been applied.

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.

[3] Costume designer Ray Holman experienced difficulty sourcing a maternity wedding dress to accommodate the nine-month baby bump worn by Eve Myles.

[1] Way states that one of the reasons Margam's Orangery was chosen for the shoot was because of the "fantastic windows" which provided a good visual opportunity in regards to a sequence involving the alien Carrie jumping out of them.

The opening sequence of the episode where Gwen pursues the shape-shifter was recorded on 19 November in a men's public toilet in The Hayes, a shopping area in central Cardiff.

The song heard on Gwen's radio Alarm Clock when she wakes up heavily pregnant is "Fire in My Heart" from the Welsh rock band Super Furry Animals.

[1] One of the black and white photos of Jack seen at the end of the episode is actually a promotional picture of John Barrowman from his role as Billy Flynn in the musical Chicago.

Ben Rawson-Jones of Digital Spy gave the episode five stars out of five, summarising it as an "energetic romp that oozed with body horror that would make David Cronenberg proud" which also "infused a type of family melodrama commonly seen on soaps".

He praised the "stunningly bonkers" plot noting that "every potential dramatic and comedic moment that stemmed from Gwen's unconventional 'bun in the oven' scenario was fully maximised".

He felt that in the central role "Eve Myles delivered an outstanding performance as Gwen" and also singled out the guest actors for praise, particularly Nerys Hughes.

[16] Writing for The Stage, Mark Wright wrote that "it’s good to see Torchwood can get in touch with its lighter side and not lose any momentum" concluding "I think I really might love this show".

She singled out writer Phil Ford for considerable praise feeling that he wrote the episode true to the characters "while filling in backstory we had no way of imagining" and delivered "drama, action, and laughs".

She praised the comedy provided from Eve Myles, Gareth David-Lloyd and Nerys Hughes in particular as well as the "terrifying moments that threaten to tip over into gross-out horror-comedy."

Her major criticisms also encompassed the nonsensical aspects of the plot and the depiction of Torchwood as an incompetent team, particularly in allowing Gwen to progress with her wedding in the circumstance of her being pregnant.

[26] Den of Geek's Andrew Mickel felt that the episode exaggerated and stereotyped the Welsh characters in the overall scenario parodying them collectively as "the Welshest people on television".