When the alien Colonel asks which one is David Vincent, David steps forward and says, "I am Vincent". Two of the younger fellows step forward and say the same thing. This is a riff on the famous scene in Spartacus.
This is the second of two episodes of the series to feature a star of "Gilligan's Island" - Russell Johnson in "The Trial" and Dawn Wells in this one.
At the beginning Eileen Brown says she is impressed by Vincent's $30.00 shoes. If adjusted for inflation, that would be equivalent to about $235 in today's money.
Tim McIntire and Kelly Jean Peters are credited together here for the first time; they would go on to the pilot for Norman Lear's Justice for All (1968), and would marry and have a child in rapid succession.
Tim McIntire and Kelly Jean Peters are credited together here for the first time. They would go on to perform in the unaired pilot for Norman Lear's Justice for All (1968). This pilot went on to become All in the Family (1971), after recasting their roles.