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                  - Susan, Ian, Barbara, Vicki, Steven, Katarina, Sara, Dodo 2 - Polly, Ben, Jamie, Victoria, Zoe
 3 - The 
                  Brigadier, Liz, Sgt. Benton, Jo, Captain Yates
 4 
                  - Sarah Jane, Harry, Leela, K-9, Romana, Adric
 5 
                  - Nyssa, Tegan, Turlough, Kamelion, Peri, Mel, 
              Ace
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          | Brigadier Alistair Gordon Lethbridge-Stewart |  
          | First Appearance: The Web of Fear | Final Appearance: Battlefield |  
          | 
  The Brigadier, while not actually a traveling 
            companion, was involved in more of The Doctor's adventures than any 
            of his other allies. Alistair Gordon Lethbridge-Stewart was a 
            colonel in the British Army when he first met The Second Doctor, who 
            helped him defeat the menace of the Yeti and the Great Intelligence 
            (The Web of Fear). By the time of their next encounter 
            (The Invasion), Lethbridge-Stewart had been promoted to 
            Brigadier, and placed in command of the British division of UNIT, 
            the United Nations Intelligence Taskforce. He happily accepted the 
            aid of The Doctor, Jamie, and Zoe against the Cybermen, and some 
            time afterward, once he'd convinced himself of the newly-regenerated 
            Third Doctor's identity, was glad to have his help on a regular 
            basis (Spearhead from Space). While his relationship with 
            this Doctor was often rocky, the two had a mutual respect which 
            deepened into a lasting friendship. The Brig, as he was often 
            called, was a bit rigid in his approach to problems, tended to do 
            things by the book, and occasionally shot first and asked questions 
            later (and he was often frustrated when the alien menaces he faced 
            proved impervious to bullets). While he remained a stickler for 
            military discipline, he learned to be more relaxed through his 
            partnership with The Doctor, and even developed, or perhaps simply 
            displayed, a sense of humor that had not been evident earlier in 
            their relationship. Lethbridge-Stewart worked with The Doctor 
            throughout his third incarnation, and was present when he 
            regenerated into his new form (Robot). The Fourth Doctor, 
            though not inclined to have the strong ties to one time period his 
            predecessor had, thought enough of Lethbridge-Stewart that he left 
            him a "space-time telegraph", which could be used to recall him if 
            needed. The Brig used the device once (Terror of the Zygons), 
            but this was his last encounter with The Fourth Doctor. Faced with 
            increasing demands on his time, most of which involved meetings at 
            UNIT HQ in Geneva, and a decrease in the number of alien incursions, 
            the Brig retired in 1976, leaving orders that The Doctor's roadster, 
            Bessie, be placed in storage (Mawdryn Undead, 
            Battlefield). The Brig took a job teaching math at Brendon 
            School, and suffered a nervous breakdown in 1977 which affected his 
            memory. He met The Fifth Doctor in 1983, and together they learned 
            the cause of the breakdown, and restored his health (Mawdryn 
            Undead). Later in 1983, he attended a UNIT reunion, and was 
            lifted out of his time, along with The Second Doctor, and forced to 
            play the Game of Rassilon in Gallifrey's Death Zone. During the 
            course of this adventure he also encountered the First, Third and 
            Fifth Doctors (The Five Doctors). The Brig eventually retired 
            from teaching and married his old girlfriend Doris. He was recalled 
            to active duty in the late 1990s when The Doctor, now in his seventh 
            form, appeared to help UNIT battle the menace of Morgaine. The Brig 
            narrowly escaped death during this adventure when he faced 
            Morgaine's demon, the Destroyer, and prevented it from destroying 
            Earth (Battlefield). 
 
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          | Liz Shaw |  
          | First Appearance: Spearhead from Space | Final Appearance: Inferno |  
          | 
  Dr. Elizabeth Shaw was the only one of The Doctor's 
            assistants who never traveled in the TARDIS. She was a Cambridge 
            research scientist with degrees in several fields, including physics 
            and medicine. Liz was selected by the Brigadier to serve as UNIT's 
            scientific advisor, but was quickly replaced in that post when The 
            Doctor arrived on Earth and agreed to help UNIT (Spearhead from 
            Space). While Liz learned a great deal from The Doctor, as a 
            talented scientist in her own right she wasn't really suited to a 
            supporting role as his assistant. After helping The Doctor and UNIT 
            against the menaces of the Autons and the Silurians, and assisting 
            him in the affairs of Mars Probe 7 and Project Inferno, she chose to 
            return to her own research. 
 
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          | Sgt. Benton |  
          | First Appearance: The Invasion | Final Appearance: The Android Invasion |  
          | 
  Sgt. Benton was one of The Doctor's most reliable 
            allies during his association with UNIT. Benton was a corporal when 
            he first encountered The Second Doctor during the attempted Cybermen 
            assault of the late 1960s (The Invasion). His performance in 
            that affair led to his promotion to sergeant, and he was assigned to 
            the Brigadier's permanent staff during the Mars Probe recovery 
            (The Ambassadors of Death). Benton had a number of triumphs 
            during his association with The Doctor, most notably the capture of 
            The Master (The Daemons), and was fiercely loyal to the 
            Brigadier, although aware of, and sometimes amused by, the Brig's 
            occasional lapses into pomposity. Benton was a firm believer in The 
            Doctor as well, and risked his career by allowing the Time Lord to 
            escape custody during the affair of Operation Golden Age 
            (Invasion of the Dinosaurs). He was promoted to Warrant 
            Officer shortly after The Doctor regenerated into his fourth form 
            (Robot), and was still serving with UNIT when that Doctor 
            assisted them against the menaces of the Zygons and the Kraals 
            (Terror of the Zygons, The Android Invasion). Benton 
            retired from the Army in 1979, and at last account had gone into the 
            used car business (Mawdryn Undead). 
 
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          | Jo Grant |  
          | Arrival: Terror of the Autons | Departure: The Green Death |  
          | 
  Josephine Grant joined UNIT after her influential 
            uncle pulled strings to get her the job. She was assigned as The 
            Doctor's new assistant, and they soon became fast friends. Jo was 
            trained in escapology, a talent which she used on several occasions, 
            and after falling under The Master's hypnotic influence during her 
            first adventure (Terror of the Autons), took additional 
            training to learn to resist his powers. In addition to serving as 
            The Doctor's assistant, she was his traveling companion on his 
            missions for the Time Lords during his exile, and met The Second 
            Doctor during the adventure in which her Doctor finally regained his 
            freedom (The Three Doctors). Jo was passionately interested 
            in the social issues of the 1970s, especially the ecology, and she 
            took a leave of absence to join Professor Clifford Jones in his 
            work. During the course of their activities against Global 
            Chemicals, she and Cliff, who reminded her of a younger, more 
            accessible version of The Doctor, fell in love. She used her uncle's 
            influence to get Cliff a research grant, and left UNIT to be with 
            him (The Green Death). 
 
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          | Captain Mike Yates |  
          | First Appearance: Terror of the Autons | Final 
            Appearance: Planet of the Spiders |  
          | 
  Another of The Doctor's UNIT allies, Capt. 
            Yates assisted in the cleanup of the first Auton incursion, and 
            was subsequently assigned as the Brig's second-in-command. Yates met 
            The Third Doctor during The Master's alliance with the Autons 
            (Terror of the Autons), and served with distinction in a 
            number of UNIT actions, including the Dalek assault on a world peace 
            conference (Day of the Daleks), and The Master's attempt to 
            gain control of Kronos (The Time Monster). He went undercover 
            during an investigation of Global Chemicals, and was temporarily 
            controlled by the sentient computer BOSS (The Green Death). 
            During a leave of absence to recover from this ordeal, he became 
            involved with Operation Golden Age, and his concern for the damage 
            that humanity was doing to the planet led him to betray The Doctor 
            and his UNIT comrades (Invasion of the Dinosaurs). In light 
            of his record, he was allowed to resign quietly, and he enrolled in 
            a meditation center to sort out his life. While there, he became 
            suspicious of the activities of Lupton and his followers, and 
            alerted Sarah Jane Smith to the problem, thus redeeming himself for 
            his betrayal (Planet of the Spiders). 
 
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