Over a dozen actors from various "Star Trek" series have made guest appearances on one or the other of the "Stargate" series. In those series, Colonel Jack O'Neill makes unsuccessful pitches to name new space vessels after the "Enterprise", and also gives the Vulcan salute in tribute to "Trek". In an earlier episode of "", O'Neill travels back in time to the 1960s and during an interrogation by an Air Force officer he refers to himself as "James T. Kirk, captain of the federation starship Enterprise". Another "Trek" reference is made when a character questions whether or not another team member can be "beamed up". The response is "What am I, Scotty"? Later on the series, advanced alien technology allows team members to "beam" up and down in manner similar to that seen on "Star Trek".