| 21. | Airlock to prepare for the mission's third spacewalk.
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| 22. | Searle releases the airlock and the three crew members rocket into space.
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| 23. | Rose opens the inner airlock door and lets her in.
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| 24. | Over by the airlock door, Sally has Rose by the throat.
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| 25. | The airlock had an additional hatch into the payload bay.
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| 26. | In the airlock, Galen takes tight hold of Cally.
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| 27. | Alan Stanley Blair of Airlock Alpha gave the episode a mixed review.
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| 28. | Carter arrives at the monitoring depot and welds the airlock door shut.
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| 29. | The tent erected over the graves has airlocks and a chemical decontamination shower.
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| 30. | An airlock was on site to keep the rescue shaft pressurized if needed.
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