Quite Eggstraordinary / Check Up

S1, E102: Big Blinky's island has been left with seaweed, rocks and other detritus after a big storm. Trolley discovers what Gill and Gull pronounce to be an egg. Elias transports the egg to Cozy Cove where it is to be kept safe. / Helinor, Dippy and Elias have to take a test to prove that they are rescue-worth. Elias fails the test and now he can't go on patrol unless Helinor or Dippy go with him.