When Tod goes around the truck on the ferry, no one is in the cab. When he comes back from the pilot house, a driver is in the truck, but only Tod and Alma were on the deck of the ferry.
When Alma gets off the bus at the ferry landing, there are several cars and about 50 people waiting. Within a few seconds of Arty talking to Tod, all of these people, the cars, and the bus have disappeared, which would not have been possible.
The sign with Lobos Island has clearly been added to the water tank that says "Welcome to Lobos Island" and covers up Port Aransas.
Tod states he was born on 3/12/1936 at 4:30 A.M. in New York City. This would make him 27 years old at the time. This doesn't fit the profile of the series, as he spent three years at Yale and then three years on the road, which would make 24 or 25 years old.