5.19, Vegas: Trivia

Although this is the second to last episode of the series, the sequences shot in Las Vegas were actually the final things to be filmed by the SGA cast and crew.
The working title for this episode was 'CSI: Atlantis'.
Both the filming style and the flashback sequences were modelled on programmes such as CSI which are shot in notably different way to SGA.
'Vegas' was leaked on the internet on December 22, 2008, twelve days before it was due to be aired for the first time.
Of the SGA cast, only Joe Flanigan actually travelled to Las Vegas
Neil Jackson, who played the Wraith, appeared as Khalek in the SG-1 episode 'Prototype' (09.09).
Steve Schirripa and Frank Vincent, the two poker players with lines, are best known for their roles in The Sopranos.
The other poker players are all well-known people from various industries: Todd Brunson and Roy Winston are professional poker players; Joel Goldsmith is a composer whose work includes the various Stargate incarnations; and Charlie Cohen is the MGM senior executive vice president and had previously appeared in the SGA episode 'Duet' (02.02).
Brad Wright, one of SGA's executive producers, appears with his wife at a blackjack table.
The line about Star Trek: The Experience was actually suggested by Robert Picardo who is most famous for his work on Star Trek: Voyager and actually appeared in Star Trek: The Experience.
Sheppard's comment about not being a huge science-fiction fan serves as both an in-joke given that SGA is a science-fiction programme, but also echoes a comment Joe Flanigan once made in an interview.
David Hewlett, who had recently been married, forgot to remove his wedding ring in several of the scenes. The producers had not initially planned for the McKay of the Vegas reality to be married but decided to keep the ring as it implied at McKay was married to Keller.
Gary Jones reprised his role of Chief Master Sergeant Walter Harriman for the eleventh time in SGA for the episode.
Rachel Luttrell and Jason Momoa do not appear in the episode.
Although not mentioned in the episode, it has been revealed by Robert C. Cooper that the Wraith found the location of this reality's Earth by successfully capturing and torturing an unspecified team from Atlantis.
This reality's Zelenka pronounces ZPM in the same way as McKay, unlike his counterpart in 'our' reality.
Detective Sheppard's office features a Johnny Cash poster which is identical to the poster which hangs in 'our' reality's Lt. Col. Sheppard's quarters.
'Vegas' is one of only two episodes in which neither Atlantis itself or a Stargate actually appear (the other is 'Harmony' (04.14)).
The door of the morgue featured the logo for the United Earth Federation as seen in the game Supreme Commander.
The Air Force personnel at Area 51 are seen wearing the new Air Force uniforms, known as ABUs (Airman Battle Uniform) rather than the BDUs which were standard wear throughout SGA.