S1E3 · The Naked Now

The crew of the Enterprise responds to messages received from the SS Tsiolkovsky, a science vessel monitoring the collapse of a supergiant star. The messages suggest, amid their rounds of laughter, that the crew has been exposed to a sudden hull breach. After the Enterprise secures the Tsiolkovsky via tractor beam, an away team beams over and finds that the bridge's emergency hatch was indeed blown, ejecting the bridge crew into space, and the remaining crew frozen to death in various stages of undress, including one who was taking a shower fully clad.

A woman's body, frozen, falls into Lt. La Forge 's (LeVar Burton) hands. Dr. Crusher (Gates McFadden) orders full medical examinations of the away team on their return, and finds La Forge sweating profusely and complaining about the temperature. She orders him to stay in sickbay, but he wanders out while she is studying his test results, and makes his way to the quarters of Crusher's son, Wesley (Wil Wheaton). Unaware of La Forge's condition, Wesley shows him a portable tractor beam device and La Forge places an encouraging hand on his shoulder.

Meanwhile, acting on a hunch by Commander Riker (Jonathan Frakes), who had read up on past starships named Enterprise that included an event involving illness and showering fully dressed, Lt. Cdr. Data (Brent Spiner) locates a historical record identifying the ailment as similar to one encountered by Captain Kirk 's USS Enterprise. La Forge returns to sickbay, where Dr. Crusher quickly becomes concerned when she realizes that the infection is spread by physical contact. Many of the ship's crew come under the influence of the ailment, with much sexier results than on Kirk's Enterprise.

Most notably, a "fully functional" Data engages in a sexual encounter with Security Chief Tasha Yar (Denise Crosby). Dr. Crusher, struggling against the effects of the ailment, finds the original antidote documented by Kirk's Enterprise to be ineffective, and begins devising a new version of it.

Now infected, Wesley uses a digital sample of Captain Picard 's voice to lure key engineering crew members away from the engineering deck. He erects a force field around the area with his tractor beam device and assumes control of the ship. He allows one of the engineers, Mr. Shimoda (Benjamin W.S. Lum), who is acting in a child-like manner, into the force field. Mr. Shimoda manages to remove all of the isolinear chips from the engine control station and plays with them like toys. As the supergiant star collapses, a fragment is blown into a direct impact course with the two Federation ships, and without the chips in place, they cannot move out of its way.

Chief Engineer Sarah MacDougal (Brooke Bundy) manages to disable Wesley's force field, and Data is sent to replace the chips. He reports that he will not have enough time. Wesley reverses the ship's tractor beam, repelling the Enterprise off the Tsiolkovsky, giving themselves the necessary additional seconds for Data to replace the chips and enabling the ship to move out of the way. The crew is cured of the ailment, and Picard partially credits Wesley for helping to prevent a disaster.