Summary
Star Trek: Voyager's Doctor became the first CMO in franchise history to become Acting Captain of a starship.
The Doctor's ambition and freedom enabled him to grow into a well-rounded individual with diverse interests and a vibrant personality.
The Emergency Command Hologram program proved beneficial for Voyager since the Doctor, being a hologram, could instantly gain essential skills and knowledge, unlike human doctors.
Star Trek: Voyager's Doctor (Robert Picardo) made franchise history by achieving a feat that no other doctor in the series had accomplished. Introduced in the pilot episode of Voyager, the Doctor immediately displayed his potential as an intriguing character. Functioning as an Emergency Medical Hologram turned Chief Medical Officer of the USS Voyager after the ship became stranded in the Delta Quadrant, the Doctor's evolution toward humanity paralleled Data's journey on Star Trek: The Next Generation. However, the Doctor's narrative added a unique dimension to the franchise's exploration of sentient machines.
Initially a blank slate, the Doctor's program was allowed to expand throughout Voyager's duration, enabling him to develop into a fully fleshed-out individual. With a vibrant personality, diverse hobbies, and ambitions that surpassed his role as Chief Medical Officer, the Doctor became a multi-dimensional character. One notable aspect of his ambition unfolded in season 7 of Voyager when he proposed the groundbreaking concept of the Emergency Command Hologram program to Captain Janeway (Kate Mulgrew). This program would empower the Doctor to assume control of the ship in the event that Voyager's command team was incapacitated or missing.
Voyager's Doctor Made Star Trek History Becoming Acting Captain
Janeway, initially doubtful, eventually agreed to implementing the Emergency Command Hologram (ECH) on Voyager. This decision marked a historic moment as the Doctor became the first Chief Medical Officer to assume the role of Acting Captain. The ECH concept was introduced by the Doctor himself in Season 6, Episode 4 of Voyager titled "Tinker Tenor Doctor Spy." It was during this episode that Janeway witnessed the Doctor's capabilities as Acting Captain when he successfully handled a confrontation with hostile aliens under her supervision. Following the official implementation of the ECH, the Doctor assumed command of the ship once again in Season 7, Episodes 16 and 17, titled "Workforce Parts I and II." These episodes featured the abduction of Voyager's crew, who were coerced into becoming part of a labor force on an alien planet.
The success of the ECH on Voyager can be attributed to the Doctor's holographic nature. Unlike a human, who would require significant training to assume command, the Doctor had the ability to download relevant information into his program whenever necessary. This allowed him to swiftly become knowledgeable in various areas, including command protocols and essential skills like engineering. Therefore, his appointment as the Emergency Command Hologram was a logical decision.
Why Other Star Trek Doctors Don't Captain Starships
While some doctors, like Beverly Crusher (played by Gates McFadden), went on to become captains of their own ships after their respective Star Trek series ended, it was not common for the doctors in most shows to serve as Acting Captain. The fields of command and medicine have little overlap in terms of knowledge and skillsets, and in emergencies, Star Trek doctors were usually needed in the sickbay rather than on the bridge. If the Captain was unable to fulfill their duties, there were always others better suited to take over, aside from the Chief Medical Officer.
Another reason why it took until Star Trek: Voyager for a doctor to assume the captaincy was due to the unique premise of the show. Stranded in the Delta Quadrant, Voyager had no access to additional personnel in times of crisis, unlike other ships that could rely on Starfleet for assistance. Commanding their respective starships was never a necessity for doctors in other Star Trek series, but Voyager, lacking the luxury of extra crew, needed more backup options. If other ships had become stranded without their safety nets, it is possible that the Star Trek franchise would have depicted doctors taking on command duties.