Watch Online Free FlixHQ. Channel 5 Documentary: More than 50 years after Dad’s Army marched on to our TVs, millions are still laughing. This documentary tells the stories of the (not so) secret lives behind the characters. (As usual, channel 5 changed the name of this doc to grab more of a punchy headline. ie DAD'S ARMY: SECRET LIVES & SCANDAL. But watch the original titles and notice that they never use the word scandal.)