| Group Elements | Missing Element | Category |
| Jack, Kate, Hurley, Sun, Sayid | |
| Kate, Sawyer, Claire, Frank, Miles | |
| 4, 8, 16, 23, 42 | |
| Libby, Ana Lucia, Mr. Eko, Cindy | |
| Looking-Glass, Orchid, Swan, Lamp Post, Tempest, Staff, Arrow, Flame, Pearl | |
| Brian Porter, Walt and Michael Dawson, Rose and Bernard | |
| Frank, Daniel, Charlotte, Miles, Keamy and is crew | |
| Temple, The Source, Cabin, Statue, Caves | |
| | Group Elements | Missing Element | Category |
| John Locke, Anthony Cooper, (Boone) Carlyle, Jeremy Betham, Mikhail Bakunin, Edmund Burke, (Desmond) David Hume, (Charlotte) Staples Lewis | |
| Roger, Keamy, Matthew Abaddon, John Locke, Caesar, Charles Widmore | |
| Christian Shephard, Yemi, Smoke Monster, Alex, Locke | |
| Sonar fence, Banyan trees, Explosives, Candidacy, The Source | |
| Internet Chess, Golf, Ping Pong, Senet, Football | |
| Nadia Jazeem, Penny Widmore, Tom Brennan, Jae Lee, Cassidy Phillips, Sarah Shephard | |
| Christian, Wayne, Roger, Anthony Cooper, Warren Ford, Charles, Michael, Robert, Pierre Chang | |
|