The first chip leads to the planet Boukan, where the pirate captain Kaliko is raiding the living oil rigs they find there. She is wearing the next datachip as an earring. Assuming the Doctor and Martha to be spies for the oil companies, Kaliko tells her crew of skeletons to throw them overboard, unaware that her first mate, Mr. Swabb Mate, is in fact the spy, as he has been promised a new body. Swabb stages a mutiny and has the oil rigs shoot down the ship, but their poor aim causes them to scatter the crew in doing so. After Swabb is knocked out by being knocked off the ship, the Doctor reveals the reason for their visit to Kaliko. She tries to escape in a pod, but is found murdered after landing near the TARDIS. With nothing left to do, the Doctor and Martha take her datachip and follow it to the next one.