During Sam's testing when he switches from Jessie to Magic, there is an unlocked padlock on the barred security window.
While Al had brought Dr. Beeks to see Sam, Al had to hold her hand so she could see him, however, Sam could not hear her. Al explained that Sam could not hear her because Al and Sam's minds were linked, so it would only stand to reason that that would work in reverse as well. However, Al was able to hear any character that was present; seeing what Sam would see would be possible, but hearing as explained in that episode, would not be able to be accomplished.
Dr. Masters says that 1961 is eight years in the future relative to 1954 instead of seven.