When Ben gets out of his car to talk to Tyler at Eddy's apartment, it looks like he is getting out of the passenger side of the car. But when the camera angle changes, he's getting out on the driver's side.
When Charlene and Cathy leave the mansion (about the 25 minute mark) Charlenes seatbelt is straight. when they stop to talk, it's twisted.
On leaving the house, Donald is having trouble starting his 1986 maroon Rolls-Royce, but the car that explodes in the fiery bombing is a 1975-vintage Ford Granada.
The Don says he knows about Matlock: that he comes from a small town that "doesn't exist any more." But several later episodes take place in that small town. (He also says Matlock's father died in a car accident, though no other episodes mention this.)
When Donald tells his wife to turn up the volume on the kitchen TV, the volume starts increasing before she picks up the remote to do so.