Discovery's astronauts got a special greeting Monday morning in advance of their departure from the International Space Station.
Actor William Shatner, who played Capt. Kirk on the original "Star Trek" TV series, paid tribute to space shuttle Discovery's voyages over the decades.
He said the shuttle has boldly gone and done what no spacecraft has done before.
This is the final flight for Discovery, the most traveled spaceship ever.
It will be retired after this mission and sent to a museum.
It's due to land Wednesday.
Shatner introduced Monday's wake-up music for the six shuttle astronauts.
The song was "Theme from Star Trek." It was the runner-up in a pick-the-wake-up-music contest sponsored by NASA.
The No. 1 vote-getter will be beamed up Tuesday.
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