Laser A laser was , in a description posited by Leela and approved by the Fourth Doctor , a very powerful light . ( TV : " Horror of Fang Rock " ) Many lasers were harmless and used in some games , ( TV : " Warriors of Kudlak " ) but others were used as deadly weapons . During their campaign to recruit warriors , the Uvodni utilised harmless laser weapons in their interactive laser - tag game Combat 3000 . However , on board their ship , the Kudlak warriors carried deadly blaster rifles that fired a yellow laser burst . Some weapons , such as Sontaran laser s , were called " lasers " despite travelling slower than light . ( TV : " The Sontaran Stratagem " ) Lasers could be used for a defensive purpose , as when the Tenth Doctor , Donna and Jenny came across a grid of heat rays in one of the tunnels underneath Messaline . ( TV : " The Doctor ' s Daughter " ) Lasers were also employed for medical purposes , in surgery , such as in laser scalpel s ( TV : " Mindwarp " ) and laser saw s . ( TV : " " ) Examples of laser weapon use . The Cybermen were armed with a wrist - mounted laser blaster that fired a red blast . ( TV : " The Pandorica Opens " ) The Dalek s used gunsticks which fired laser rays which could be modified into hand - held Tommy rifles . ( TV : " Evolution of the Daleks " ) The parallel Torchwood developed laser weapons , which destroyed Cybermen and could blast through a Dalek ' s shield . ( TV : " Doomsday " ) These weapons were later upgraded , to the point that they could destroy Daleks in one shot . ( TV : " The Stolen Earth " ) Jack Harkness had a compact laser deluxe . ( TV : " Bad Wolf " ) Jack once used components from a pair of androids to build a high - powered energy weapon out of a defabricator . ( TV : " Bad Wolf " ) The Sontaran s utilised laser rifles during their invasion attempt . In addition , Sontaran batons fired a laser that could cripple their victims . ( TV : " The Poison Sky " ) The Judoon carried hand - held blaster pistols which fired a red disintegrator beam . ( TV : " Smith and Jones " ) The Toclafane had laser blasters built in to their casings . ( TV : " The Sound of Drums " ) Chantho used a laser pistol to shoot the Master . ( TV : " Utopia " ) Eva Saint Julienne used a laser pistol to shoot the Jagrafess . ( TV : " The Long Game " ) Novice Hame carried a laser gun for protection when searching for the Tenth Doctor . ( TV : " Gridlock " ) The Slitheen - Blathereen family used bracelets which fired orange lasers . ( TV : " The Gift " ) The Meron s carried a trident - shaped weapon which shot 3 green beams . ( TV : " Liberation " ) The Korven had a laser weapon on their palms . ( TV : " The Korven " ) Ahab made use of a laser lasso . ( TV : " The Bounty Hunter " ) CCPC s were armed with a palm - mounted laser blaster that fired a red beam . ( TV : " Aeolian " ) The Chameleons threatened the Second Doctor ' s and Samantha Briggs ' s lives with a laser beam . ( TV : " The Faceless Ones " ) Behind the scenes . In the video game " Attack of the Graske " , which this wiki does not consider to be as it has multiple endings which we cannot qualify through any mechanism which one is the " correct " or " canonical " one , Graske on the planet Griffoth were shown to be armed with tiny laser pistols which fired purple blasts to combat intruders .