The passing of criminal Silty Moffatt causes Sarge and Prof to reminisce on how they defeated him years ago at the siege of Mallory Wharf. Then Marilyn and Hero introduce the new Marine Incident Response Unit, actually an inflatable dinghy with an outboard motor. Prof is not impressed and persuades aquaphobic Sarge to go back on the patrol boat with him, where they easily beat the MIRU to an emergency. Flushed with their success, they then accidentally run into the ashes of Silky which are being spread on the water.
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