When Ellie sees her Dad and she asks him about pancakes, he replies "Oh boy." This line is spoken by actor Scott Bakula's character, Dr. Sam Beckett, in every episode of Quantum Leap (1989).
Casey attends NextExpo09 under the alias "David Coleman", as written on his name badge. David Kentucky Coleman is the prop master on Chuck.
Right before the beginning of the "NextExpo09", when Ted Roark (Chevy Chase) is greeting the Japanese collaborators, he greets the first in Japanese by saying "Arigato". He then greets the second Japanese collaborator in mock-Japanese, by saying "In-a-gadda-da-vida", the title of an Iron Butterfly's song.
This episode sees 2 Star Trek alum. Robert Duncan McNeill (Lt Tom Paris on Voyager) is the director and Scott Bakula (Captain Jonathan Archer on Enterprise) is long lost dad.
Additional Star Trek connections - the General is played by Bonita Friedericy, wife of John Billingsley, who played Dr. Phlox on Enterprise. She also appeared in one episode of Enterprise.