The famous Hughs Glomar Explorer appears in the background while John and Roy are responding to a decompression illness patient in the Coast Guard helicopter.
The cookbooks that Chef Michel gives to Roy and Jon appear to be copies of the first volume of Julia Child's Mastering The Art Of French Cooking.
Roy de Soto has to explain the effects of pressure at a depth of 165 feet to the dive victim's buddy Walt (Del Monroe). Monroe played "Seaman Kowalski" for 4 seasons on "Voyage to the Bottom of the Sea", where dives at even greater depth were commonplace.
Michael Roy was an actual chef with at least eight cookbooks published (one of which was likely handed to John and Roy).
First script written for the show by producer Edwin Self.