10 Monsters and Aliens With the Most Ridiculous Weaknesses

Some of the most iconic monsters and aliens in science fiction have appeared on Doctor Who during its 60-year run on television. With a range of forms and abilities, showrunners have always captured audiences’ imaginations, with foes ranging from the timeline-warping Time Beetle to the omnicidal Daleks.

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Still, not every monster and alien on the show is powerful and flashy. Initially appearing as a dangerous threat, some later reveal their absurd flaws, making even the show’s most ardent followers laugh.



A crime family from the planet Raxacoricofallapatorius is known as the Slitheen and was first introduced in the Series 1 episode “Aliens of London” where they infiltrated 10 Downing Street. They are big green aliens who pose as humans and scour planets for anything they can sell to make money.

Composed of calcium, the Slitheen have one major weakness: vinegar, or acetic acid, as the Doctor put it more eloquently. When splashed with vinegar, they violently explode into clots of green blood.

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The Zygons were a species of metamorphic humanoids from the planet Zygor, though they frequently attempted to leave it. Zygons’ crumpled design is among the most imaginative in Doctor Whoand their eerie whispering sounds are fascinating given the organic components they have built into their technology.

Still, fans may be surprised to hear that an old grandfather clock could have defeated the show’s evil shapeshifters, despite the Zygons’ evolution as an alien enemy. They were easily hypnotized by the pendulum of a clock, as a 1997 video game put it. fate of doctors. Zygons also showed a strong aversion to fire, but that’s at least a little more understandable than some antiquities.


The Krillitanes were a race that could take physical traits from other races they had subdued, and they would “pick” the best traits from those they had wiped out. First appearing in Series 2 Episode 3, “School Reunion”, the Krillitanes took the form of bat-like forms with long necks.

The Krillitan have a lot to their credit, but one of their most puzzling traits is their vulnerability to Krillitane Oil. According to augmented media like the 2009 novel, The Krillitane Stormit describes how The Krillitane’s continued abuse and ongoing physiological changes led to her frailty.


The parasitic, sentient astronomical object known as the Akhaten – also known as the Old God or Grandfather – consumed the souls of the Sunsingers of Akhet. introduced in Series 7 Episode 7, “The Ring of Akhaten”. The inhabitants of the nearby worlds regarded him as a powerful and fearsome deity.

The revelation that the Old God of Akhaten can easily be defeated by a certain hand given to a seemingly normal girl, Clara Oswald (Jenna Coleman), is a surprise for the fans. Although the theory behind it, that the leaf contains an endless number of potential causalities, is perfectly plausible: it’s still underwhelming that a leaf would subdue a god.

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The Kaveetch founded the military and aggressive humanoid race known as the Sontarans on the planet Sontar, first introduced in Season 11 Series 1, “The Time Warrior”. The Sontarans were humanoids with short, stocky bodies and large, bulbous skulls, often likened to “giant potatoes with ray guns”.

The ventilation probe in the Sontaran neck has always been their weakest point. They would perish if a sharp object was inserted into the vent. Although the Sontarans are a race of genetically modified beings, this weakness has always been a matter of debate, despite its universal justification.


The creator of the Daleks is without a doubt one of the most intelligent characters in Doctor Who. Originally the leader of the Kaled scientific elite on the planet Skaro, Davros is frequently referred to by his creations as the creator, also known as the Dark Lord of Skaro. Davros not only spawned the Daleks, but developed a wide array of weapons during the conflict between the Thals and the Kaleds and, despite having a crippled body, prevented death for hundreds of years.

However, given his vast intellect, the existence of an on/off switch on Davros’ life support chair is still puzzling. Therefore, in the classic story “Genesis of the Daleks,” the Doctor came perilously close to using this serious design flaw to stop the emergence of the Daleks.


Although the Daleks are among Doctor Who’s deadliest foes, the original series has a history of them being mistreated. The Daleks were a warrior species composed of genetically engineered mutants with primary DNA type 467-989 and were first introduced to Doctor Who fans in Season 1 Series 2, “The Daleks”.

The Daleks referred to the Doctor as their greatest enemy on numerous occasions. Nonetheless, previous models of Daleks were confused by stairs due to their gliding pace, which is surprising given how adept they were at conquering planets.

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The androids known as Movellans were introduced in The Fate of the Daleks and fought against the Dalek Empire. The Movellans all wore white tight-fitting uniforms, appeared to be people of different races and sexes, and had dreadlock-style pigtails. Remarkably, they are also more physically capable than humans.

However, the main weakness of the Movellans is their flawed design, as each android’s external power supply held by their belts was easily removable, rendering the android completely inoperable. Once removed, the circuitry of the power supply can be modified so that the android follows another being’s instructions.


The Abzorbaloff took on the role of Victor Kennedy and infiltrated LINDA to kill the Doctor. He was the main antagonist in one of Doctor Who‘s most controversial episode, “Love & Monsters”. He only had to touch his victims to absorb their bodies, memories and consciousnesses.

Despite his advantages, the Doctor defeated him simply by breaking his cane, destroying his ability to maintain control over the people he was assimilating. It goes without saying that it gives the Abzorbaloff an extremely weak appearance, leaving viewers wondering just how effective his innate absorption powers are.


The Cybermen were a race of cybernetically-enhanced humanoids that originated from Earth’s twin planet Mondas and first appeared in Season 4 Series 2, “The Tenth Planet”. They became ruthlessly analytical and calculating, with emotions almost completely erased from their heads as they introduced more and more artificial components into their bodies as a means of self-preservation. The Daleks and Cybermen are also at odds with each other.

Despite the Cybermen’s great physical abilities, their non-corrosive properties make them vulnerable to gold as long as the metal enters their lungs or respiratory system. Given that they’ve walked the moon, a satellite with no oxygen, that’s an absurd weakness.

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Sarah Ridley

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