I'm compiling a list for a friend who hasn't time to watch a lot. I found this thread, but it's far too extensive. My list is minimal. I'm trying to include all the important story arcs and themes, e.g: The Borg Species 8472 Dreams; hallucinations; illusions Q Eugenics/Augments Crossovers between series Mirror universe Time-travel Nazis Data and the Doctor dreaming or becoming more human; Dr. Soong Commander Shran's friendship with Archer Dominion War I have more in mind, but not sure what's actually important. What themes do you think should be included? What I need help with are hidden-gem episodes, like One Little Ship, The Haunting of Deck Twelve, Tuvix, Rascals and Distant Voices. I have no reliable way of finding these episodes. They fall under no conveniently searchable theme on Memory Alpha. What hidden gems do you know?