It is not possible for a STOCK Hummer H2 to make the jump that it did over the hill on the way to the airport. The year model that they drive doesn't have the power to make it over the hill and get airborne.
Towards the end of the episode, the blond lab lady started walking off behind the dark haired legal lady who was under arrest. Camera angle changes to in front of the group of people and the blond haired lab lady is walking in the lead.
Mid way through this episode, Horatio refers to Calleigh as "Em". Calleigh is played by Emily Proctor.