They are also vulnerable to " coronic acid " ( The Two Doctors ).

All the Sontarans depicted in the television series have monosyllabic names, many beginning with an initial ' st ' sound ( e. g. Styre ( The Sontaran Experiment ), Stor ( The Invasion of Time ), Stike ( The Two Doctors ), Staal ( The Sontaran Stratagem ), and Strax ( A Good Man Goes To War ); exceptions are Linx ( The Time Warrior ), Varl ( The Two Doctors ) Skorr ( The Sontaran Stratagem ) and Kaagh ( The Sarah Jane Adventures )).

They appear for the final time in the original series in The Two Doctors.

This imprint comes from the Rassilon Imprimatur, part of the biological make-up of Time Lords, which gives them both a symbiotic link to their TARDISes and the ability to withstand the physical stresses of time travel (" The Two Doctors ", 1985 ).

In " The Two Doctors " ( 1985 ), the Second Doctor also used a portable Stattenheim.

However, there are episodes that seem to contradict this view, or at least to point to a relaxation of it: " Genesis of the Daleks ," where the Time Lords ask the Doctor to prevent the creation of the Daleks or at least change them into a less violent race, " Image of the Fendahl ," where the Time Lords destroyed the fifth planet of Sol and then used a Time Loop to hide all records of its existence, and " Two Doctors ," where the Time Lords enlist the aid of the Doctor to prevent the independent development of their method of time travel.

Murphy's Law Book Two, Murphy's Law Book Three ,< ref > Murphy's Law: Doctors: Malpractice Makes Perfect,

Troughton enjoyed the return to the programme so much that he readily agreed to appear one more time as the Second Doctor, with Colin Baker's Sixth Doctor in The Two Doctors ( 1985 ).

In The Two Doctors, the Doctor states that the " Rassilon Imprimatur " allows Time Lords to safely travel through time, becoming symbionts with their TARDISes, and that the reason other species are incapable of developing time travel are that they lack the imprimatur.

In The Two Doctors, the Doctor engages in astral projection, but warns that if he is disturbed while doing so, his mind could become severed from his body and he could die.

In " The Two Doctors ", it is suggested that Time Lords are responsible for maintaining a general balance of power between the races of the Universe.

The CIA has occasionally sent the Doctor on missions that required plausible deniability, as in " The Two Doctors ", and sometimes against his will, Colony in Space and The Monster of Peladon.

Two prominent residents competed to have the town named after themselves ; Doctors Josiah S. Bailey and A. J. Ray owned land that was to become the townsite.

Spin Doctors is an American alternative rock band formed in New York City, best known for their early 1990s hits, " Two Princes ", and " Little Miss Can't Be Wrong ", which peaked on the Billboard Hot 100 chart at No. 7 and No. 17 respectively.

" The Spin Doctors made an appearance on Sesame Street, singing a modified version of " Two Princes " that emphasized the importance of sharing.

However, the most successful genres have been rock, popular and traditional fusion, with performers such as U2, Enya, Westlife, Boyzone, Phil Lynott and Thin Lizzy, Gary Moore, Rory Gallagher, Horslips, Bob Geldof and The Boomtown Rats, Clannad, Stiff Little Fingers, Altan, Frank Patterson, The Corrs, The Dubliners, The Chieftains, The Bothy Band, De Dannan, The Divine Comedy, Josef Locke, The Irish Tenors, Van Morrison, Therapy ?, The Saw Doctors, Planxty, The Wolfe Tones, Snow Patrol, The Cranberries, In Tua Nua, The Undertones, Ash, B * Witched, Nadine Coyle, The Hothouse Flowers, The Script, Two Door Cinema Club, Something Happens, The Clancy Brothers, Tommy Makem, Dana, Mundy, Sinéad O ' Connor, Paul Brady, Christy Moore, Dónal Lunny, Val Doonican, Ronnie Drew, Luke Kelly, Ruby Murray, Peter Cunnah ( of D: Ream ), Daniel O ' Donnell, Bridie Gallagher, Brendan Bowyer, Gilbert O ' Sullivan, Mary Black, Sir James Galway, Johnny Logan, Bill Whelan ( of Riverdance fame ), Damien Rice, Phil Coulter, Glen Hansard, and Celtic Woman achieving success nationally and internationally.

The Rutans only appeared on television in the serial Horror of Fang Rock, in which a single Rutan is encountered, though they are mentioned in some serials featuring Sontarans ( The Time Warrior, The Sontaran Experiment, The Two Doctors, The Poison Sky and The Last Sontaran and Enemy of the Bane episodes of Doctor Who spin off The Sarah Jane Adventures ).

* Patrick Troughton later reprised the role of the Second Doctor in The Three Doctors, The Five Doctors and The Two Doctors.

In The Two Doctors, he is on an assignment for the Time Lords, which is incompatible with the events seen here.

Two new comic strips were introduced, these being The Riot Squad and Fred's Bed, reprints from Hoot and The Beezer and Topper respectively.

Two years later the HP-25C introduced continuous memory, i. e. programs and data were retained in CMOS memory during power-off.

Two of the earliest commercial digital synthesizers were the Fairlight CMI, introduced in 1979, and the New England Digital Synclavier II.

Two very well known smooth jazz stations are WNUA in Chicago and 94. 7 The Wave in Los Angeles, both of which were introduced in 1987, and still continue to enjoy tremendous success in the format today.

Two additional recipes from the 1900s vary in the precise ingredients, but omit the cherry which was introduced after 1930 as well as the soda water which the occasional recipe calls for.

Any Hohenstaufen in Sicily was bound to have claims over the cities of Lombardy, and as a check to Manfred, Urban IV introduced Charles of Anjou into the equation to place the crown of the Two Sicilies in the hands of a monarch amenable to papal control.

Two systems introduced in historical catalogues remain in use to the present day.

Two events helped to increase whisky's popularity: first, a new production process was introduced in 1831 called Coffey or Patent Still ( see in section below ); the whisky produced with this process was less intense and smoother.

Two free tabloid newspapers were also introduced in the early 2000s, ' Metro and Sp! ts, mostly for distribution in public transportation.

Two Canadian provincial governments, Ontario and Quebec, introduced measures in 2008 that would protect at least half of their northern boreal forest.

Two Home Rule Bills ( 1886 and 1893 ) were introduced by Liberal Prime Minister Ewart Gladstone, but neither became law, mainly due to opposition from the House of Lords.

Two novels titled Hard Crash and Prophet's Power were published, expanding on the premise and story first introduced in Unreal.

Two other constitutional campaign finance reform amendments were introduced in Congress in November, 2011.

Two groups of people were introduced to East Timor: Portuguese men, and Topasses.

Two drugs named zanamivir ( Relenza ) and oseltamivir ( Tamiflu ) that have been recently introduced to treat influenza prevent the release of viral particles by blocking a molecule named neuraminidase that is found on the surface of flu viruses, and also seems to be constant across a wide range of flu strains.

Two members of the German Dendrology Society, E. J. Martin and Illa Martin, introduced the giant sequoia into German forestry at the Sequoiafarm Kaldenkirchen in 1952.

They were introduced in Donald Knuth's 1974 book Surreal Numbers: How Two Ex-Students Turned on to Pure Mathematics and Found Total Happiness.

Two South American species of trees, the Jacaranda and the Flamboyant, which were introduced during the colonial era, contribute to the city's colour palette with streets lined with either the lilac blossoms of the Jacaranda or the flame red blooms from the Flamboyant.

Two terrapin species are also found, the native European pond terrapin ( Emys orbicularis ) and the introduced American red-eared slider ( Trachemys scripta ).

Two Audience Matches were played on Match Game PM, for a possible total of $ 10, 000, or $ 20, 000 after the Star Wheel was introduced.

Two years before the Preakness was run for the first time, Pimlico introduced its new stakes race for three-year-olds, the Preakness, during its first-ever spring race meet in 1873.

He is introduced in The Two Towers as the chief advisor to King Théoden of Rohan and henchman of Saruman.

Two of the first patterns Lenox produced were introduced in 1917, the Ming and Mandarin, which were eventually manufactured for over fifty years.

In The Two Towers, chapter 6, the Riders of Rohan are introduced before they are seen, by Aragorn, who chants in the language of the Rohirrim words " in a slow tongue unknown to the Elf and the Dwarf ", a lai that Legolas senses " is laden with the sadness of Mortal Men.