After a number of top scientists and inventors are kidnapped the head of a technology company believes he is next and contacts Vincent for help., The president of an electronics firm risks his life to help David prove that the earth has been invaded., The president of an electronics firm (Arthur Hill) risks his life to help David prove that the earth has been invaded. David: Roy Thinnes. Eve: Diana van der Vlis. Tom: Mark Richman. Millington: Peter Brocco. Noel: Theo Marcuse. Psychiatrist: Noah Keen.