During Ando and Hiro's discussion of super-heroes, Hiro's cross hand gesture is that of Ultraman (1966), the Japanese television series about a superhero who has many high energy, one-on-one battles with monsters on miniature sets.
Kristen Bell (Elle Bishop) and Blake Shields (Flint Gordon) previously worked together on a Veronica Mars (2004) episode, President Evil (2006).