There were other special guests in the cast of this episode. Playing an NX-01 Engineer in one scene was NASA astronaut Mike Fincke. Fincke made news on STARTREK.COM in December when he and Russian cosmonaut Gennady Padalka received a "Starfleet Award" after their return from a six-month mission on the International Space Station (related story). During his stay in orbit, Fincke had an opportunity to speak with Scott Bakula using a very-long-distance phone connection; now he was able to chat with him in person!
Fincke is the second NASA astronaut to appear in a Star Trek episode. Mae Jemison (STS-47) played Lt. Palmer in the Star Trek: The Next Generation episode "Second Chances" in 1993.