midnight
I mean they might brainwash him or something . '' `` It 's a risk , '' Tom agreed . `` But that 's my problem -- how to make a perfect spy out of him . '' It was midnight when the cargo jet touched down on the Enterprises airfield . The boys slept soundly . The next morning Tom reported to Mr. Swift and Harlan Ames the outcome of his trip to San Rosario , including the attack en route by unmarked sky raiders . He also privately told his father about his plan to use Exman as an electronic spy .