Mr and Mrs. Brauer, played by Peter Hobbs and Doris Roberts, were in episodes The Sighting (1978) (gold-liquidation), and would show up again in Wojo's Girl: Part 1 (1979).
When Dietrich is quoting statistics to the VA representative and the Chemical Company representative, they ask ,"Who are you?" Dietrich says, "Just a stranger passing through". This is a reference to a bible verse. Hebrews 11:8-10.