MI High - Series 4 - Mrs King: License to Spy

The memory wipe the spies gave Mrs King during a previous mission is starting to fail and she is about to remember the spies' real identities. Rose, Carrie and Oscar must send her on a mission she will never forget. Or will she? Mrs King's memory wipe is failing. Soon she will remember that in the basement of her school Rose, Carrie, Oscar and Frank work as spies for MI9. This will have catastrophic results for all: they will have to disband and leave MI9 for good. Frank and the spies develop a strategy to help Mrs King forget once and for all. They cannot use another memory wipe, as this could leave Mrs King with permanent brain damage. Instead they construct an elaborate mission for her to complete as a real spy. If it works, she should think it was her subconscious mind playing tricks on her and it was all just a dream. If it fails, the spies' careers are over. There is only one problem: Mrs King is a brilliant spy and unearths a real SKUL villain at St Hope's. Will the spies believe her?