While the anomalous recording on SCP-1666 bears a superficial 
resemblance to track five played in reverse, it is a completely new 
recording and, when reversed itself, contains different lyrics and 
instrumentation than the standard recording of “ .” These 
new vocals are in an as-yet unidentified language. Voice-print 
analysis confirms that the new track shares no vocalists in common 
with the rest of the album. In addition to differing lyrics and 
instrumentation, the anomalous recording also contains several 
harmonics in frequencies that are generally only audible to people in 
late adolescence or earlier. (Typically those younger than 18 years 
of age.) 


All subjects who listen to this anomalous recording universally report 
feelings of dread and unease. Subjects who can perceive the 
underlying harmonics experience this to a substantially greater 
degree, and may experience depression, suicidal ideation, paranoia, 
and, in a minority of cases, aggressive acting out. 


All these symptoms appear to derive from a disconnect between the 
subject and reality. In many cases this disconnect remains 
subliminal and subject never progresses beyond a vague feeling of 
the world being unreal. In cases where the initial symptoms are 
severe due to perception of the recording's underlying harmonics, 
the subject may become conscious of this disconnect. This will 
manifest as livid fantasies and what subjects term "uneasy dreams" 
about unreal environments. These imagined environments share 
several common characteristics: 


¢ Landscapes and architecture show impossible geometries that 
are difficult to verbalize, possibly as a result of mapping 
higher-order spatial dimensions onto three-dimensional 
sensory perceptions. 


¢ Environments contain malevolent entities described in various 
ritualistic and contradictory ways; "seen and unseen," "living 
and unliving," "nowhere and everywhere," and similar. 


¢ The act of perception in these environments is associated with 
physical pain, often resembling a severe migraine. 


« These environments seem hyper-real to the subjects 


experiencing them. 


Once subjects become aware of this imagined environment, their 
perception of it becomes obsessive and progressively more intense 
over time. Once a subject reaches this stage, they will continue to 
experience these fantasies and dreams regardless of any 
therapeutic, chemical or surgical intervention yet attempted. The 
perceptions of this environment will erode the subject's ability to 
interact with the world around them, eventually intruding on the 
waking conscious mind until the subject can only react to elements 
within the fantasy. 


These symptoms may occur when listening to the recording 
backward or forward, though they present more intensely when the 
recording is heard as it is naturally played on SCP-1666, backwards. 
Analog recordings of SCP-1666 will also show these effects to a 
lesser extent. Digital copies do not seem to present the same 
dangers. 


« SCP-1665 | SCP-1666 | SCP-1667 » 


SCP-1667: Shoe-In 


Item #: SCP-1667 
Object Class: Euclid 


Special Containment Procedures: All known articles of footwear 
affected by SCP-1667 are to be stored in Containment Locker 16 at 
Storage Site-23. Due to the contagious nature of SCP-1667's 
effects, no shoes, boots, sandals, flip-flops, slippers, flippers, foot- 
wraps, galoshes, moccasins or clogs are permitted to enter a 2 
meter radius surrounding Containment Locker 16 without the prior 
approval of Researcher Davis. Socks are permitted. On a fortnightly 
basis, one member of personnel with Level 1 security clearance 
must carefully open Containment Locker 16 and reposition all 
footwear inside to its most north-westerly positions. In the event of a 
containment breach caused by pressure-related internal damage to 
SCP-1667's container, all footwear affected by SCP-1667 is to be 
re-contained and Containment Locker 16 reinforced. 


Note: It is suspected that SCP-1667 may not be fully contained. In 
the event of a suspected instance of containment breach, a barefoot 
Mobile Task Force must be sent to investigate. 


Description: SCP-1667 is a contagion that spreads between almost 
any type of footwear. Any organism wearing or in physical contact 
with an item of footwear affected by SCP-1667 is compelled to reach 
an unknown location deep below the central Pacific Ocean, 
regardless of personal danger. Almost all items of footwear, the 
main exception being socks, are susceptible to contagion of 
SCP-1667. Organisms affected by SCP-1667 will attempt to remain 
in physical contact with affected footwear. Humans under the effects 
of SCP-1667 are able to communicate semi-rationally but are 
primarily driven by their goal to enter the Pacific Ocean and may 
become physically violent in order to achieve it. Class D personnel 
under the effects of SCP-1667 were able to use basic navigation 
skills to avoid obstacles in their path yet always selected travelling 


on foot over the use of any type of vehicle. Footwear affected by 
SCP-1667 has been noticed over time by staff slowly moving south- 
west in a linear pattern, at a rate of approximately 12.7cm per week. 
It is speculated that the effects of SCP-1667 have caused many 
humans and possibly other land animals to drown with the 
appearance of suicidal intent. 


The first object discovered to be affected by SCP-1667 was a brown 
and red leather hiking boot (hereafter referred to as SCP-1667-1) 
recovered from Beach, , New Zealand in 19 . The small 
town came to the Foundation's attention after seventeen people 
were reported missing in the area within two months. Upon 
investigation it was discovered that several of the missing persons 
had been seen near Beach on the days of their disappearances. 
Mobile Task Force - was sent to conduct a thorough search of the 
beach, which led to the discovery of SCP-1667-1 and the effects of 
SCP-1667. The contagious nature of SCP-1667 was discovered 
when other articles of footwear brought into SCP-1667-1's area of 
effect began to produce the same effects after a short exposure 
time. | members of Mobile Task Force - did not remove their 
boots during the recovery of SCP-1667-1 from Beach and in the 
resulting chaos, [DATA EXPUNGED]. 


The following test log has been classified and any personnel 
requesting this data must have the approval of one member of 
personnel with Level 2 security clearance. 


+ Addendum: Test Log SCP-1667 
Log 02/03/ 


Affected Item/s: SCP-1667-2 (black combat 
boot, owner deceased) 

Unaffected Item: Black business shoe (owned 
by Researcher Davis, held by Subject D-8267) 
Objective: To observe the range of 
SCP-1667's effects. 

Results: Effects of SCP-1667 manifested in 
black business shoe (and D-8267) after 
approximately 8.41 seconds of exposure from 


1.4 meters distance. Black business shoe 
reclassified as SCP-1667-11. 


Affected Item/s: SCP-1667-11 (black 
business shoe, owned by Researcher Davis) 
Unaffected Item: Subject D-8267 (female, 
Hispanic, 26 years old, 67kg, 158cm tall) 
Objective: To observe a human under the 
effects of SCP-1667. 

Results: Subject held SCP-1667-11 against 
her chest and began running towards the door. 
When subject's path was blocked by 
Researcher Davis, subject stated "Move". 
When Researcher Davis did not comply, 
subject kicked him in the groin and sprinted 
from the room. Subject attempted to leave 
facility and was terminated. SCP-1667-11 was 
partially damaged and has been discontinued 
from further testing. 


Log 02/04/ 


Affected Item/s: SCP-1667-2 

Unaffected Item: Irish Terrier (female, golden 
red, 4 years old, 13kg, 39cm tall, GPS tracker 
implanted) 

Objective: To determine whether SCP-1667 
affects animals other than humans. 

Results: Effects of SCP-1667 manifested in 
subject after approximately 5.23 seconds of 
physical contact with SCP-1667-2. 
SCP-1667-2 detached from subject. 


Log 02/18/ 


Affected Item/s: SCP-1667-2 

Unaffected Item: Parthenocissus quinquefolia 
(also known as Virginia creeper) 

Objective: To determine whether SCP-1667 
affects organisms other than animals. 


Results: Effects of SCP-1667 noticeably 
manifested in subject after two weeks of 
physical contact with SCP-1667-2. Subject 
grew approximately 23 centimetres south- 
west, differing from its natural eastward growth 
direction. SCP-1667-2 detached from subject. 


Log 02/19/ 


Affected Item/s: SCP-1667-2 
Unaffected Item: Common bottlenose dolphin 
(male, grey, 15 years old, 452kg, 3.62m long, 
waterproof video camera attached, GPS 
tracker implanted) 
Objective: To discover the location to which 
SCP-1667 leads its victims. 
Results: Effects of SCP-1667 manifested in 
subject after approximately 54.3 seconds of 
physical contact with SCP-1667-2. Subject 
was transported from facility, released from 
Beach and tracked south-west for 
approximately 3500 kilometres before signal 
was lost. Subject was noted to have begun 
increasing in speed exponentially after it 
reached coordinates °S °W. Video footage 
revealed nothing of interest. SCP-1667-2 
presumed unrecoverable. 


Log 03/04/ 


Affected Item/s: SCP-1667-3 (black combat 
boot, owner deceased) 

Unaffected Item: Two navy blue flippers 
(owned by Agent __ , held by Subject D-8268) 
Objective: To spread SCP-1667's effects to a 
pair of flippers. 

Results: Effects of SCP-1667 manifested in 
navy blue flippers (and D-8268) after 
approximately 10.13 seconds of exposure from 
1.2 meters distance. Left and right navy blue 
flippers reclassified as SCP-1667-12 and 


SCP-1667-13 respectively. 


Affected Item/s: SCP-1667-12 and 
SCP-1667-13 (two navy blue flippers, owned 
by Agent __) 
Unaffected Item: Subject D-8268 (male, 
Caucasian, 32 years old, 77kg, 179cm tall, 
GPS tracker implanted) 
Objective: To discover the location to which 
SCP-1667 leads its victims. 
Results: Subject was given an Atmospheric 
Diving Suit (ADS) with waterproof video 
camera and audio communicator attached and 
was instructed to put on SCP-1667-12 and 
SCP-1667-13. Subject was then released from 
Beach and tracked to coordinates °S 
°W. Once D-8268 reached this location, video 
feed was lost due to equipment failure and 
subject began noticeably increasing in speed. 
Analysis of background noise in the audio feed 
and the muttered commentary of subject 
D-8268 indicated movement of an underwater 
entity at least meters in length before [DATA 
EXPUNGED] resulting in the loss of audio feed 
and GPS tracking. Notably, 3 minutes and 17 
seconds before signal was lost, D-8268 
claimed to observe [REDACTED] and ADS 
oxygen levels began decreasing at a 
significantly faster rate. Investigation is 
ongoing. SCP-1667-12 and SCP-1667-13 
presumed unrecoverable. 


Audio File: The final minute recovered from 
SCP-1667 Audio Feed. 


Further testing of SCP-1667 has been discontinued in order to 
prevent additional possible containment breaches. 


« SCP-1666 | SCP-1667 | SCP-1668 » 


SCP-1668: Deliver Us From Knowledge 


Item #: SCP-1668 
Object Class: Safe-praedico 


Special Containment Procedures: The original vinyl records on 
which SCP-1668 instances are acquired, as well as digital 
recordings of SCP-1668 kept on USB flash drives, are to be stored 
in a storage locker at Site 83. Any further instances of SCP-1668 are 
to be studied, recorded, and contained similarly. Access to 
SCP-1668 recordings is restricted to personnel with Access Level 
1668/2 or higher. 


Efforts to locate the individual(s) responsible for creating SCP-1668 
are underway. 


Description: SCP-1668 is a set of three audio recordings 
composed of samples from a variety of publicly available pieces of 
music. Typically, the piece from which any given sample originates 
is readily identifiable. 


When an individual listens to the first twenty-four minutes and nine 
seconds of an instance of SCP-1668, they will hear the remainder of 
the recording regardless of whether or not it is actually played. This 
occurs regardless of whether the listener has heard any of the music 
in the remainder of the instance prior to testing. This effect has only 
been consistently replicated (>90% of subjects experiencing the 
aforementioned effect) in neurotypical individuals, with the presence 
of any mental illness or abnormality significantly decreasing the 
likelihood that the individual will be susceptible. 


Each instance of SCP-1668 has been found in the mailbox of a 
Foundation staff member not residing on Foundation property, along 
with a hand-written note. Several witness reports indicate that these 
materials were hand-delivered by groups of unidentified individuals; 
however, no footage or photographs of the deliveries have been 


found. 


SCP-1668-1 is thirty-seven minutes long, and contains samples 
from seventeen pieces of rock music published between 1963 and 
1973, in rough chronological order. It was recovered on April 04, 
2005, with the following note attached: 


Dear SCP Foundation, 


First and foremost: a mutual friend whose privacy | am 
obliged to respect has provided me with the means to 
contact you. Further, | can assure you that, due to my 
use of intermediaries who have refused to inform me 
further, | lack the knowledge necessary to reveal your 
organization to the general public. Of course, | do not at 
all expect you to trust me, but that's a bridge that we 
shall cross when we come to it. 


On the record I've sent you (a quirk of mine, I'm afraid; | 
hope you're not adverse to a little anachronism), you will 
find a composite of various rock songs recorded between 
1963 and 1973. If one were to listen to the first 24m9s of 
the recording, they would immediately and involuntarily 
deduce the remainder of the composition. Disregarding 
the various philosophical cop-outs that could be applied 
to the situation, it would seem that, circa 1969, an 
individual listening to the proper series of oft-heard music 
could know the full lyrics to "Stairway to Heaven" well 
before either Page or Plant! possibly could have. This, 
along with similar chronological oddities, are why | have 
contacted you. 


It is my understanding that your organization deals with 
appropriately-named "memetic" anomalies of this type on 
a regular basis; however, the predictive capability of this 
One in particular, | believe, is of great importance. My 
own dabbling in the neurological and musical sciences 
was sufficient to produce this, but it is beyond my 
capability to analyze it rigorously enough to provide 
answers. Please take this recording and perform any 
research you find appropriate. 


Sincerely, 
Erich Zann2 


SCP-1668-2 is forty-one minutes and forty seconds long, composed 
of samples from a variety of genres published between 1909 and 
1993, again arranged in rough chronological order. All pieces 
sampled before the 24m09s mark were written before 1979. It was 
recovered on July 19, 2006, with the following note attached: 


Dear SCP Foundation, 


It's me again. It's taken me the past two years, but I've 
created a recording similar to the one | delivered to you 
in the spring of last year. Given that I've used a process 
identical to the one | used the first time around, this 
would suggest that | have not stumbled upon a trivial 
chronological oddity, but have instead developed a 
repeatable method by which one can infer that music 
itself is pre-determined. 


While this is merely disheartening from a musician's 
standpoint, the degree to which musical and general 
history are intertwined indicates a somewhat unpleasant 
lack of free will that almost certainly extends to all of 
human society. | hope you understand my concern: It is 
one thing to speculate on free will and matters of history 
in the hypothetical sense, or behind the lens of fiction; it 
is quite another to find the question thrust inescapably 
into your consciousness.