Random Breath Test Season 14 Episode 14 What A Doobie

35-year-old Nathan is headed home from a Subway pit stop with his wife. 11-year sober Nathan is clean as a whistle for his breath test but his drug test might be a different matter. He can't seem to remember when he last had a 'Doobie' (Cannabis). Officer Jones prompts him. One minute Nathan says 5 days, the next 2 until he tangles himself up in a positive knot.