Sam's family is not often talked about on the series, due to the fact that Sam rarely gets along with his father, a highly respected and feared military man whom was once referred to as "Colonel Badass". His father holds the rank of General and disapproves of Sam leaving the special forces to join the SRU. In Season Three, it is revealed that when Sam was 9 years old his younger sister was struck by a speeding car in front of him. The force was so fast and strong that it knocked her right out of her shoes -- leaving them beside Sam, while she died upon impact. The memory stops him briefly when he finds a young blonde woman in a pool of blood with no shoes on. Sam, however does have another sister - Natalie Braddock, who first appears in Season Three and continues to recur on the series.