From episode #131, The Case of the Travelling Treasure
After finding the victim, the Lieutenant exits the cabin and has a few words with the Captain of the boat...
Note that his top row of ribbons are unhooked on one side and are hanging down over the bottom row.
During the conversation, the camera cuts away for a short reaction shot and, when it returns, the ribbons are magically rehooked and in their proper place.
There's a clip of the Marlin Scene on YouTube here. Vidcaps are below. Can anyone confirm that this sequence is from To Have and Have Not? (daveb)