The chart is missing the character of normal Lando Calrissian.
 Finished scenes and additional info
Not sure how to edit a wiki very well, but I have figured out some interesting and/or missing info through experimentation.
First off, Darth Vader is the one who unlocks the Imperial Meeting Room and Vader/Sith Mediation scenes.
Ithorian Food is unlocked by delivering an Ithorian (hammerhead-looking alien) to the level, but it MUST have a '?' on its head. This applies to Mon Cala Aquarium as well. The Mon Calamari that you deliver must not be Ackbar, and must have a '?' on its head. In order to unlock these regular aliens that have a '?', I believe you have to buy them from the Bux Store under the Bitizens section.
I'll try to add this info to the wiki, but it'll take some trial and error. Glad this exists now.
I have found that the Snowtrooper unlocks the Scoop of Hoth, though it took me several tries. --18.104.22.168 12:16, 7 February 2014 (MST)
Found that Stormtrooper also activates scene on Tractor Beam level...
 Not working unlocks
--22.214.171.124 05:19, 11 February 2014 (MST)
The Snowtrooper works fine for me on Scoop Of Hoth. No other Bitizens appear in that scene for me, so unless you can unlock multiple scenes for the one level, I'd say that Hoth Luke is probably incorrect.
I can confirm that the Snowtrooper works with the latest 1.3 update.
Boba (holiday) should have an X on Interrogation. --126.96.36.199 12:57, 17 February 2014 (MST)
 Jedi Luke
You don't have the scene down for Jedi Luke. Obviously he has one because he has a " ? " in the elevator.
- Strangely, there are a large number of characters that get the "?", but don't unlock any scenes anywhere, including the variants of the Star Characters and the entire Galactic Registry. Of the 60-odd characters that I've tracked with a ?, only the ones currently listed on the scene grid actually get one. Gousha (talk) 23:32, 2 November 2015 (MST)