Miami Twice: Oh to Be in England - S7-E9
Audio problem: Del and Rodney are on the plane to Miami. Rodney tells Del to take the headphones off. Del's mouth says 'what, these?', but it is overdubbed with a laugh.
Miami Twice: Oh to Be in England - S7-E9
Other mistake: Del had the smuggler's letter in his pocket when he fell in the swamp. When he takes it out at the rangers station, it's perfectly dry. Surely, it should be soaked.
Miami Twice: Oh to Be in England - S7-E9
Visible crew/equipment: At one point when Del is searching for Rodney around the mansion, you can see the shadow of a camera on the wall.
Chosen answer: An apparent long string of illnesses.