Don asks Stephen Logan if he is the owner of a 2001 Saturn Ion. Production of the Ion, however, did not begin until 2003.
When David Sinclair pretends to be a Jamaican delivery boy at the Logan residence, the character alludes to a previous role in which Alimi Ballard played a Jamaican delivery boy in FOX's Dark Angel.
It seems a little odd that the kidnappers have bound the hands and feet and taken pictures of the hostages with duct tape over their mouths, but when it comes to finding them at the end of the episode, their mouths are uncovered, so they can scream out. There seems no reason that the kidnappers would have made them any more comfortable.
What's the point of Charlie reverse-engineering that algorithm? He emails the program over to Don, saying it should mean something to the car manufacturer. One of those number sequences should do the trick because they are as unique as the algorithm. Surely the manufacturer can associate the right algorithm to one (or some) of those sequences. So there's no need for Charlie to do his math magic this time.
At one point, just after Charlie e-mails Don some info, he and his team are setting up outside the father's home. Close-captioning reads Don as saying "I don't see the Saturn. Everybody just hold." But nothing can be heard on the audio.