Spock

Spock was a Star Trek character that Rose Tyler associated with a more "professional" approach to the use of technology. Whilst in 1940 London, she once bemoaned the Ninth Doctor's reliance on the sonic screwdriver and conversation as his primary investigative tools. She demanded that he "give [her] some Spock" in their search for a downed Chula ambulance. Later, in an effort to explain to Captain Jack Harkness who the Doctor was, she gave the Time Lord the alias "Mr Spock", because she suddenly realised she didn't even know his proper name. (DW: The Empty Child)

Donna Noble also seemed familiar with the character of Spock. She compared the Tenth Doctor's method of reading a person's thoughts to that of Spock's "mind meld". (NSA: The Nemonite Invasion)

On one occasion, the Eleventh Doctor recalled memories of his fourth incarnation actually meeting up with Spock and the command crew of the USS Enterprise to combat a Cyberman invasion of Aprilia III during the 23rd century in a parallel universe. (IDW: Assimilation²)

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