Asuma dies in episode 078-079.
Shika, Choji and Ino fight Kakuzu and Hidan in 81-87
Ino first appears the same episode Sai first appears (which is around episode 33, I guess). Then she appears around Asuma death, and again at these latest episodes of shippuuden that are coming.
he dies in episode 79 by hidan but shikamaru takes his revenge. the fatal blow is in 79 but he doent show signs of him atcualy being dead until the next episode. you can watch the episode below: