"Time Squared" is the 13th episode of the second season of the American science fiction television series Star Trek: The Next Generation, the 39th episode overall. It originally aired on April 3, 1989, in broadcast syndication. The episode was written Kurt Michael Bensmiller and directed by Joseph L. Scanlan.

Set in the 24th century, the series follows the adventures of the crew of the Federation starship Enterprise. In this episode, the crew of the Enterprise encounter a double of Captain Picard, apparently from the future.

While the Federation starship Enterprise is en route to their planned destination, ship's sensors detect a lone shuttlecraft drifting through empty space with no power or fuel reserves. When Lt. Worf and Commander Riker use the tractor beam to bring it into the shuttlebay, they find it has the same name and registry as an Enterprise shuttle. Inside is a double of Captain Picard, barely clinging to life.

After the double is brought to sickbay for treatment, Lt. Commander Data and Chief Engineer La Forge power up the shuttle, after lengthy delays due to unexpected technical incompatibility. It is then discovered that the shuttle's internal clock is about six hours ahead of the ship's chronometer which means that the shuttle, and therefore Picard's double, is from six hours into the future. They recover a very poor quality sensor log video that shows the Enterprise falling into an energy vortex and being destroyed after the shuttle is launched.

Chief Medical Officer Dr. Pulaski determines that the incoherent double's biological functions are out of sync, but are improving as the future Picard draws nearer to his own time. Picard orders that his future self be revived, but is unsuccessful in extracting any information from him. Picard is disquieted at the idea that he would abandon his ship and its crew.

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