We have a winner! "LATENT IMAGE" is the correct answer!
To explain...
1. It's what's inside that counts... The Doctor uses his camera to view the insides of the crew. And it started him looking into the mystery.
2. Three in one... the alien gun shoots 3 people at once... Kim, Jetal, and The Doctor.
3. Round and round... The Doctor goes round and round his question on how he chose between Kim and Jetal.
4. Quoting... The Doctor quotes from the book at the end.
5. Good shots... The Doctor gets some good snapshots with his camera.
6. Develop your own thing... The Doctor developed his own surgical technique for the procedure he did on Kim, which got the ball rolling on the episode.
7. Never seen before... Ensign Jetal was never seen or heard of before.
8. Equal chance... Kim and Jetal have the same odds of survival, but he can only pick one.
9. Bad shuttle ride... they were attacked in the shuttle. Can't really call that a good ride.
10. Who do you like more?... The Doctor said he chose Kim over Jetal because he was closer to him than her.
11. Physicals... The Doctor is going to use the new imaging tool for the crew physicals.
Your turn, Discofan.