"Projections" is the 19th (3rd in the second season) episode of the American science fiction television program Star Trek: Voyager. Originally slated for the first season, the episode originally aired on September 11, 1995, and tells the story of Voyager's holographic doctor having an identity crisis on the holodeck regarding whether he or the world around him is the illusion.

Brannon Braga compared "Projections" to the work of René Descartes, and wrote the episode around the premise of cogito ergo sum, questioning whether the Doctor or the Voyager is the illusion. Beating out LeVar Burton (Geordi La Forge) for the guest appearance, Dwight Schultz as Reginald Barclay was praised by the cast and crew, especially for his on-screen chemistry with co-star Robert Picardo. The episode received decidedly mixed reviews, ranging from 50–92% approval with critics commenting on predictability and the underutilization of Schultz and Picardo.

Voyager's Emergency Medical Holographic Program (EMH), "the Doctor" (Robert Picardo), is activated due to a red alert. Despite the computer's (Majel Barrett) assertion that nobody is aboard, B'Elanna Torres (Roxann Dawson) soon arrives in sickbay. She informs the Doctor that the ship was attacked by Kazon and that all except herself and Captain Janeway (Kate Mulgrew) have abandoned ship. After treating her injuries, Torres transfers the Doctor's program to the bridge using newly installed holographic emitters there. After treating the captain and then assisting Neelix (Ethan Phillips) to defeat a stray Kazon in the mess hall, the Doctor discovers he's bleeding and feeling pain, neither of which are functions of his program. In sickbay, making inquiries with the computer, the Doctor is told that there are no holographic programs matching his own and that he is actually Lewis Zimmerman (Picardo)—whom the Doctor recognizes as his programmer.

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