Donna 's US citizenship is called into question .
Sam gets another visit from someone who wants to give him orders on what to do , this time from a respected former teacher of his who wants the U.S. to fund a major scientific research effort .
Donna 's U.S. citizenship is called into question .
Sam gets another visit from someone who wants to give him orders on what to do , this time from a respected former teacher of his who wants the U.S. to fund a major scientific research effort .