America ends its space program, making Stephen's astronauts skills as obsolete as dodo husbandry, Zune programming and American manufacturing. (04:10)

Tags:  space,  NASA,  crying,  performances,  under the desk,  robots,  impressions,  America,  moon landing,  Russia,  money,  astronauts,  animals,  the heroes,  dreams,  kids,  movies,  C.O.L.B.E.R.T.,  songs,  WristStrong

Stephen talks to astronauts in space, fears space spiders, trains to be an astronauts and announces the C.O.L.B.E.R.T. space treadmill. (03:51)

Tags:  On Topic,  exclusives,  mashups,  NASA,  astronauts,  robots,  technology,  C.O.L.B.E.R.T.,  animals,  aliens

Stephen begins his astronaut training by working in zero gravity, running on his space treadmill and test-driving moon wheels. (05:13)

Tags:  Fallback Position,  on location,  NASA,  space,  science,  animals,  spiders,  C.O.L.B.E.R.T.,  exercise,  technology,  driving,  work/office,  astronauts,  In the Field

If President Obama keeps mentioning Stephen, he'll soon be upgraded to a Selleck mustache. (02:35)

Tags:  Barack Obama,  space,  facial hair,  Robert Gibbs,  Jimmy,  C.O.L.B.E.R.T.

Stephen has an update on his space treadmill, and he'll evolve Richard Dawkins' book into tiny shreds of paper. (00:29)

Tags:  intro,  environment,  space,  Richard Dawkins,  evolution,  books,  C.O.L.B.E.R.T.,  Joe Biden

NASA begins assembling Stephen's treadmill so America's famously fat astronauts can get trim in space. (03:39)

Tags:  NASA,  space,  C.O.L.B.E.R.T.,  Jimmy,  Space Module: Colbert,  Twitter,  exercise,  weight/obesity,  media,  Tony Harris

Bob Park doesn't understand why humans need go to space when robots can do a better job. (05:14)

Tags:  interviews,  Bob Park,  science,  space,  anniversaries,  moon landing,  NASA,  Mars,  robots,  technology,  C.O.L.B.E.R.T.

However far the space station goes, Stephen's treadmill will always have gone a few miles more. (06:33)

Tags:  Space Module: Colbert,  interviews,  democracy,  space,  NASA,  voting,  Sunita Williams,  exercise,  cracks up,  Colbert Nation,  challenges,  monkeys!,  C.O.L.B.E.R.T.