When his turn comes, the Czech scientist Dr. Radek Zelenka reads his personal video message to his family in perfect Czech. The actor who plays him, David Nykl, is of Czech descent and fluent in several languages including English and Czech. Whenever his character was asked to speak Czech during the series, Nykl translated the lines for the writing staff.
While Zelenka is recording his message in Czech, detailing the rising of Atlantis from the ocean floor. He is asked if he said anything that would require security clearance. Funnily enough while he talks, there is a Naquadah generator in the background. Which is classified technology.
First appearance of Amanda Tapping on Stargate: Atlantis (2004). Although credited as a guest star, she is onscreen for a only few seconds and has one line.