Walker
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Also known as "Baby Walker", he was the youngest of Sarah's children who was unable to live on Terra due to its atmospheric pressures, and thus had to remain on Paradeen for the rest of his life (or planets with its pressure). The baby was also in the house when Commandant Leiter of the Eastern Alliance and his men demanded to know where the two advanced Viper craft and its pilots were; the baby being used as leverage against Sarah. (Greetings from Earth)
Portrayed by David Larson
Notes
As with all of Sarah's onscreen children in "Experiment In Terra", Walker was a child of Glen A. Larson.