Lost in Space S03 E13 Two Weeks in Space

"A space colony family struggles to survive when their ship is hopelessly thrown off course."

Two aliens, who are actually intergalactic bank robbers, transform themselves into Earthlings. They revive a man named Zumdish who operates a tour agency and they pretend to be his clients. The Robinson's head off and Dr. Smith is left alone, Smith's decides to turn the ship into a hotel and doesn't realize how dangerous his guests are.