Sip Fel-Fotch Passameer-Day Slitheen

Sip Fel-Fotch Passameer-Day Slitheen was disguised as a policeman towards the ends of the episode Aliens of London and during world war 3. As Sip-Fel-Fotch was being electrocuted Mickey Smith came to Jackie’s rescue. Once he'd recovered he went to find Jackie who was now hiding in Mickey’s flat. Sip then found Mickey and Jackie and with the doctor's instructions Jackie prepared a mixture of pickled eggs, gherkins and onions to throw over the Slitheen. This is because the Slitheen were made out of living calcium and vinegar is an acetic acid. The living calcium structures of the slitheen were weakened by the compression field around their necks. Therefore it exploded. Harriet Jones likened this to Hannibal who crossed the Alps by dissolving rocks with vinegar.