Intruder alert Intruder alert was an alert status on Federation starship s and space station s . It could be declared at any time , by computer or any crew member upon detecting an intruder on board . It could also be activated automatically based on predefined criteria , such as entering a restricted area . The alert was announced by audio and crewmembers were expected to take appropriate action . In 2266 , a security alert 3 announced a possible intruder aboard a vessel . ( ) Intruder alert was also known as " general quarters security condition three " . ( ) In 2269 , Spock announced an intruder alert in response to the crew of the ' s realization that was actually a Vendorian spy ing for the Romulan s . ( ) In the mid - 2270s , the " Enterprise " computer detected an intruder on deck five ( the Officers ' Quarters ) and announced an intruder alert . Captain James T . Kirk commanded a security team to the deck , where he determined that the intruder was a probe , in the form of Ilia , sent by " V ' ger " . ( ) In 2364 , Wesley Crusher rushed to the bridge to warn of an impending intruder alert he detected while experimenting with ship ' s long range sensors . The warning was immediately confirmed by Tasha Yar and an audible alert over the ship ' s Comm . This type of alert was later referred to as a Proximity alert or Proximity alarm to differentiate an approaching vessel from a shipboard intruder . ( ) In 2367 , Captain Jean - Luc Picard attempted to sound an intruder alert when " " appeared in his quarters . ( ) In 2369 , Miles O ' Brien activated the intruder alert and called a security team into his quarters when the fictional character Rumpelstiltskin appeared in Molly ' s bedroom . ( ) In 2370 , Doctor Julian Bashir called intruder alert when he suffered an attack from a tentacle while in the infirmary , which , unknown to anyone at the time , was actually an out - of - control Odo . ( ) In 2371 , when the energy patterns of the Komar and Chakotay were forcing the crew of the to perform actions against their will , Tuvok initiated an intruder alert . ( ) " In 2372 of an alternate timeline , the computer of the declared an intruder alert and that there was an unauthorized launch in progress when Ensign Harry Kim and Tom Paris hijacked it . " ( ) Rom activated an intruder alert which was detected by Damar after Odo failed to deactivate the alarms on a conduit leading to an EPS feed . ( ) In 2373 , Captain Kathryn Janeway underwent a mind meld with Lieutenant Tuvok to try to determine the source of an apparent repressed memory . In the meld , she was sent to the bridge of the in 2293 in Tuvok ' s memory . A disruption of the meld caused the Captain Hikaru Sulu of the memory to notice her presence and he declared an intruder alert , but she and Tuvok solved the problem by returning to an earlier stage of the memory , in which she was able to steal an appropriate Starfleet uniform to blend in . ( ) That same year , Janeway called security for an intruder alert when she discovered Q within her quarters . She received no response and Q commented that there was " no need to call for room service " as he had already ordered , indicating champagne . Janeway repeated her order for an intruder alert but again got no response and Q commented that he had " taken the proverbial phone off the hook . " ( ) Also that same year , when the holographic character Marayna appeared in Tuvok ' s quarters despite having apparently been deleted , Tuvok called for an intruder alert , but she used her control of the " Voyager " computer system to silence it . ( ) Additionally , when The Doctor realized that macrovirus es had infested " Voyager " s mess hall , he declared an intruder alert on deck 2 , Section 13 . ( ) In Lieutenant Tuvok ' s " Insurrection Alpha " holoprogram , the " Voyager " computer declared an intruder alert on deck 8 when the Lieutenant Tom Paris and Captain Kathryn Janeway of the program transported there . ( ) " In an alternate timeline , Neelix helped repair the internal sensor s aboard the USS " Voyager " after they had been seriously damaged due to repeated Krenim attack . He wanted to try several variations on the audio warning for Intruder Alert sound , but security chief Tuvok ordered him to keep the standard Intruder alert sound . " ( ) Tuvok initiated an intruder alert and called for security to deck one when the two astronaut s from the planet that " Voyager " was trapped above in orbit transitioned into " Voyager " s timeframe . ( ) In 2374 , the crew of " Voyager " initiated an intruder alert when they discovered that a member of Species 8472 had penetrated their hull and invaded the ship . ( ) In 2376 , Lieutenant B ' Elanna Torres jokingly declared " intruder alert " when her old boyfriend Lieutenant Maxwell Burke accessed a command station in engineering without her prior authorization . ( ) In 2377 , Lieutenant B ' Elanna Torres declared an intruder alert when she and Seven of Nine found Fantome hiding in one of " Voyager " ' s cargo bay s . ( ) In 2378 , the " Delta Flyer " computer reported an intruder alert when the Talaxian child snuck aboard the vessel . ( ) In 2379 , an intruder alert was declared by Lieutenant Commander Worf when the Reman s boarded the on deck 29 . ( )