status of "artist", although not a "person". This permitted him to rewrite the novel. Four months later, it was known throughout the Alpha Quadrant as a very thought-provoking piece of work. Several other EMHs, now relegated to mining duty, experienced the novel. The Doctor's standard greeting was "Please state the nature of the medical emergency" when activated, though later modified to say whatever he chose. In "Jetrel", it was revealed that he was given the ability to activate and deactivate himself. The Doctor later acquired a mobile holographic emitter from the 29th century ("Future's End"). Although he had previously been confined to Sickbay or the Holodeck, the mobile emitter allowed The Doctor to move about freely, making him ideal for missions where the environment would be harmful or otherwise fatal to the crew. In one notable incident, when an away team was trapped on a radioactive planet, The Doctor was able to infiltrate the people and almost single-handedly rescue the team because, as he pointed out, being a hologram renders him immune to the radiation, stating that "being a hologram does have its advantages." In a 2020 interview, Picardo recalled his initial reticence to the concept of a mobile emitter: The Doctor's programming evolved from his first romance, Dr. Denara Pel, to the point where he fell in love with Seven of Nine, though she was unable to reciprocate. In an alternate future episode, "Endgame", The Doctor finally adopts a name (see below) and marries a human female named Lana. In the final episode of Star Trek: Voyager, a future version of Janeway also informs him of his later invention of a device known as a 'synaptic transceiver', something that fascinates The Doctor; he's cut off by the 'present' Janeway, who is abiding by the Temporal Prime Directive, before he can learn more. Emergency Command Hologram The "Emergency Command Hologram", aka "ECH", is first coined by The Doctor in the episode "Tinker, Tenor, Doctor, Spy", in which he creates a program which allows him to daydream, such as adding routines which allow him to take command of Voyager – including a command uniform – in the event of the command crew being incapacitated. At the end of the episode, Captain Janeway promises to consider the idea. In the following season episode "Workforce", the idea is realized when the crew is forced to abandon ship, and The Doctor takes over command