We love Burn Notice here. We started watching because Bruce Campbell (Evil Dead trilogy, Brisco County Jr, etc) is one of the stars, and we LOVE Bruce. He plays the "friend that used to inform on him to the FBI." Gabrielle Anwar is the "trigger happy ex-girlfriend" although ex should be in quotation marks. She was the lead in the 90's Disney movie "Wild Hearts Can't be Broken." Sharon Gless plays the lead character's Mom, and she's fun to watch. A couple of weeks ago, they had an episode that guest starred Tyne Daley (Gless' co-star in the 80's show Cagney & Lacey).
It's a mix between the first Mission Impossible movie and a modern day Robin Hood. The lead, Michael Weston, was disavowed in "Mission Impossible speak", burned in the show speak, and has been trying to clear his name, and find out who was responsible and why. That's the show's arc. But since he needs to pay the bills in the mean time, he takes jobs where he is helping out people that have been "wronged" in some way.