Benson mentions her extensive work helping rape victims, Mariska Hargitay actually is a trained rape crisis counsellor. She was inspired to pursue her certification, and founded the Joyful Heart Foundation in 2004, after she began receiving mail from fans disclosing, many for the first time, that they were survivors of sexual assault and/or abuse.
When Fin tells Captain Williams that he was also a Ranger, she says "sua sponte". Latin for "of [one's] own accord", the phrase is the Rangers' motto, and refers to their ability to accomplish tasks with little to no prompting.
Ice-T was in the Army from October 1977 to December 1979. He was an infantry man, but he wasn't a Ranger.