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Externally, Daleks resemble overgrown pepper shakers, with a single mechanical eye stalk, a gun stalk containing a directed energy weaponA weapon is a tool used to kill, maim, destroy or perhaps simply disable, a person or animal and as a result, also to threaten and defend. Since the dawn of humanity the use of weapons has been codified resulting in both martial arts and strategic doctrin (or " death rayThe concept of a death ray is generally portrayed as some form of directed energy weapon that projects energy at a person or object in order to destroy them. Research and development A death ray weapon is under active research and development, but most ex"), and a telescoping robot arm. Usually, the arm is fitted with a device for manipulation that, to the amusement of generations of viewers, resembles a plungerCommon household plungers A plunger is a common device used to release stoppages in plumbing. It consists of a rubber cup with an attached stick, usually made of wood. The cup is pushed down against the drain, and either pressed hard into the drain to for, but various episodes have shown Daleks whose arms end in a tray, a mechanical claw, or other specialised equipment. The casings are made of a material known as dalekanium. (In the alternate future of Day of the DaleksDoctor Who serials Day of the Daleks is a serial in the British science fiction television series Doctor Who which originally aired in four weekly parts from January 1 to January 22, 1972. Synopsis Sir Reginald Styles, a British diplomat trying to organiz, dalekanium is an unstable explosive that can penetrate Dalek casings. The two may or may not be the same.)
The creatures inside their "travel machines" are depicted as soft and repulsive in appearance, but still vicious even without their mechanical armour. In Resurrection of the Daleks a Dalek creature, separated from its casing, attacks and kills a human soldier. The Doctor has described the Daleks as "little green blobs in bonded polycarbide armour." However, as the creature inside is rarely seen on screen, the misconception that Daleks are wholly mechanical robots exists, a mistake the series itself has made on occasion.
Due to their gliding motion Daleks were notoriously unable to tackle stairs, which made them easily overcome under the right circumstances. An often-copied cartoon shows a flight of stairs with a sign saying "To Earth" at the top; at the foot of the stairs a Dalek says "Well, that mucks up the invasion plans." In Remembrance of the DaleksDoctor Who serials Remembrance of the Daleks is a serial in the British science fiction television series Doctor Who which originally aired in four weekly parts from the October 5 to October 26, 1988. The serial opened the 25th anniversary year of the ser they can climb stairs using a sort of limited antigravity (first used in Planet of the Daleks), but their awkward forms still limit their mobility in tight quarters. In a classic scene from Destiny of the Daleks , the Doctor and companions escape from Dalek pursuers by climbing into a ceiling duct. The Doctor ( Tom Baker) calls down "if you're supposed to be the superior race of the universe, why don't you try climbing after us? Bye bye!" The Daleks generally make up for their lack of mobility with overwhelming firepower.