Doug doesn’t like to talk about his past. None of the other detectives know what he was like before he came to SEVEN-O, either. But he does show an obsession with investigating a certain man…
I did a good deed, don't you 
think, Doug Billingham?
قمتُ بعمل نبيل، ألا تظنّ ذلك 
يا دوغ بيلينغهام؟
Findest nicht auch, dass ich ihr ’nen
Gefallen getan hab, Doug Billingham?
Hice algo bueno,
¿no crees, Doug Billingham?
Le hice un favor,
¿no crees, Doug Billingham?
Je lui ai fait une faveur,
Doug Billingham.
Ho fatto una buona azione, non credi, Doug Billingham?
Fiz uma coisa boa, não acha,
Doug Billingham?
Согласись, я совершил
хороший поступок, Даг Биллингхэм?