For security reasons he has always kept this a secret for his family .
When he confronts his grandfather with that , he tells Charlie the truth : Oscar is a secret agent for the British secret service MI5 for more than 30 years .
For security reasons Oscar has always kept this a secret for Oscar 's family .
When he confronts his grandfather with that , he tells Charlie the truth : Oscar is a secret agent for the British secret service MI5 for more than 30 years .