Since we don´t saw exactly what happened with the TailPlane characters, the producers decided to show us in this episode, since everyone want to see Sayid reaction, that was a smart move by the writers, to delay this situation.
For the first time in Lost, the episode is a flashback episode, the entire episode cover what happened to them.
The weak point of this episode is that you already know who is the villain or the "Others" and you know what happened.
So, with no element of surprise and shocking value, the producers had to focus on details and emotional moments only. This was well done and since this episode is better than the previous episode and the fillers, a 8 is suitable.
Overall, good details, dialogues and some emotional moments make this episode be worth watching.