WARNING: DO NOT ATTEMPT TO LEAVE YOUR 
IMMEDIATE AREA. In the interest of security, you 
have been administered a lethal memetic agent that 
can only be counteracted within the hour. Await 
security personnel and be prepared to confirm your 


identity. 


Object Class (classified): Thaumiel 


Note: The previous description is a cover story and is 
based on what were initial conclusions. The artifact's 
effects have proven to be of a very different nature. It is 
likely that SCP-1968 is affecting the past. 


Initial Experiments 


The first experiment with the subject proved uneventful, 
with routine medical examinations revealing no untoward 
effects. When the subject returned to their quarters after 
debriefing, however, it appeared to them that their 
furniture had been altered which they reported in keeping 
with standard procedure. No evidence could be found to 
support their claim. Subsequently, the subject seemed 
confused about their shifts of duty, when they were 
scheduled, and to whom they were to report. 


After the second experiment, the subject appeared 
alarmed and confused. The laboratory where testing had 
taken place seemed changed to them. The subject also 
professed that personnel appeared to be missing while 
others were completely unfamiliar. Interrogation of the 
subject showed that they were in possession of 
drastically different memories, encompassing such areas 
as diverse as their personal history, the nature of 
Foundation assets, and the historical record. (see 
interview A, excerpt) 


At first, it was assumed that the artifact had in some 
unknown way affected their mind. Interrogation of the 
subject, however, showed that their memories were 
extraordinarily detailed and self-consistent. Furthermore, 
the subject demonstrated knowledge of classified 
material to which they could not possibly have been 
exposed, including the existence of SCP- and SCP- 
that had, as of then, not been secured, let alone 


identified. The operating assumption at the time was that 
the subject had been compromised by forces unknown. 


At the conclusion of the third trial, the subject's account 
of the previous experiments themselves were in stark 
contradiction with the record. Among other things, they 
claimed that it had been the nineteenth such experiment. 
After a lengthy debriefing, the subject was able to furnish 
a kind of proof of their claims in the form of a testable 
experimental prediction. (see interview B, excerpt). It 
was discerned that the subject was referring to a 
measurable change in the strength of the Casimir force,2 
implicating a change in the rate of virtual particle-pair 
production in the vacuum$, even though ostensibly 
nothing — even in principle — may affect such rates. 


Findings 


In an effort to corroborate their account, measurements 
were performed inside the artifact's sphere of influence, 
with negative results. Efforts were suspended when, 
unexpectedly, back-channel reports surfaced of the 
discovery of just such phenomena at CERN‘ at the time 
the artifact had been in operation. Experiments were 
repeated away from the artifact's immediate vicinity and 
succeeded in detecting the effect. Further experiments 
were performed as distantly as New Zealand, South 
Africa and the Antarctic, reproducing the same findings. 
A probe in Jupiter space that had been clandestinely re- 
tasked concluded the same. The vicinity within the 
artifact's area of operation (and consequently the 
subject) appeared insulated from the effect, perhaps by 
design. 


Conclusions 


Based on the chronology of these experiments, it seems 
that the effect propagates nearly instantaneously, ata 
rate comparable to the cosmological inflationS which 
occurred shortly after the Big Bang. Grand Unification 
theories suggest that the combination of the anomalous 


virtual particle production along with the super-luminal 
propagation are consistent with a global retrocausality 
event. 


One interpretation that has been put forth is that the 
entire Universe is being affected by the artifact. It would 
be our and the universe's past which is being altered. 
The subject's memories would then be accurate and 
would remain the only record of the timeline before its 
alteration. In light of this possibility, further testing has 
been suspended indefinitely. The consent of all O5 
administrators is required to perform further experiments. 


Recent Developments 


After testing was discontinued, the subject evaded 
Foundation supervision and attempted suicide. The 
subject has since become catatonic and been placed in 
long-term care. 


Two months later, the artifact engaged itself without 
human intervention in a manner inconsistent with its 
previous operation. A person which superficially 
resembled the subject emerged. They were badly 
wounded, having suffered unidentified chemical burns 
over 60% of their body. The subject-alternate died 
shortly thereafter without being able to be interviewed. It 
remains unknown how the artifact managed to activate 
itself. Security was increased. 


A further month later, the artifact once again activated 
itself, this time disgorging a non-human entity, heavily 
armed (see report - - ). The entity was ultimately 
neutralized after killing a dozen personnel and wounding 
scores more. The weapon in its possession behaved ina 
manner inconsistent with current understanding of 
physical law.® It has been remarked that in outward 
appearance the weapon resembled SCP-1968. The goal 
or purpose of the entity has not been established. 


Containment procedures were upgraded to the level they 


remain at now. 


Addendum 


The suggestion has been made that, in the event of an 
imminent CK-class reality-ending scenario, SCP-1968 
could be used in a last ditch-effort to avert catastrophe, 
but at the cost of irrevocably and unpredictably altering 
the past. Such a decision could obviously not be made 
lightly. To do so would ensure that the world as we know 
would cease to exist. At the same time, to do nothing 
might guarantee the same. Such a metaphysical 
dilemma is perhaps beyond our ability to resolve. 


It should be pointed out that if the artifact had already 
been used in this manner, we would have no evidence of 
it. The incursions that have recently taken place might 
well have been attempts to use the artifact to accomplish 
exactly that. 


Notes 

1. Theoretically one of the densest states of matter 
possible, neutronium is a proposed name for a 
substance composed purely of neutrons. It has been 
used to refer to extremely dense phases of matter 
resembling the neutron-degenerate matter theorized to 
exist in the cores of neutron stars. 

2. The Casimir effect can be expressed in terms of virtual 
particles interacting in the vacuum. It is best described 
and more easily calculated in terms of the zero-point 
energy of a quantized field in the intervening space 
between objects. This predicted force has been 
measured, and is a striking example of an effect purely 
due to second quantization. Essentially, particle-pairs 
coming in and out of existence too quickly to 
measure,even in principle, none the less give rise to 
measurable side effects. 

3. In physics, a virtual particle is a particle that comes 
into existence for a limited time and space and then just 
as quickly disappears. The energy and momentum of a 


virtual particle are uncertain according to the uncertainty 
principle. The degree of uncertainty of each is inversely 
proportional to time duration (for energy) or to position 
span (for momentum). 

4.Centre Européen de Recherche Nucléaire, Geneva, 
Switzerland. 

5. Cosmological inflation is the theorized exponential 
expansion of the early universe by a factor of at least 
$10*{78}$in volume, driven by a negative-pressure 
vacuum energy density. The inflationary epoch 
comprises the first part of the electroweak epoch 
following the grand unification epoch,$10{-36}$seconds 
post-singularity. Following the inflationary period, the 
universe continued to expand, but at a constant rate. 

6. Based on a review of particle detectors in the 
confinement area at the time, it has been established 
that the weapon functioned by slightly altering the 
magnetic moment of the neutron in affected matter, 
upsetting the electromagnetic balance of the nucleus, 
and causing it to fission spontaneously. The means by 
which this is affected cannot be determined as the 
weapon was destroyed by the entity prior to being killed. 


« SCP-1967 | SCP-1968 | SCP-1969 » 


Retrocausality Torus Interview A 


Interviewee: Subject 
Interviewer: Dr MV 


Foreword: 

Following the 2nd trial, Subject was debriefed according to standard 
operating procedure. 

Unbeknownst to the subject, passive polygraph testing in effect. 
Note: Subject emotionally labile and somewhat paranoid. 


Subject: We've been over this and over this...let me get some 
sleep. 


Interviewer: You'll get it...once your debrief is over. 
Subject: What have you done withDrW =? 


Interviewer: As / keep telling you, there's no such person. You've 
seen the personnel manifest...do you think I'm trying to mislead 
you? 


Subject: (no reply) 


Interviewer: You don't remember researcherB —__? You've worked 
with him a number of times before. According to him, you've 
developed a degree of friendship... 


Subject: I've never heard of him. | don't know who that is. 


Interviewer: But you acknowledge that he knows personal details 
about you. How could he know those things? Like who you dated at 
University? The name of your sister's children? 


Subject: (tiredly) | don't know. | don't know how. 


10 minute break. Subject allowed a soft drink and a cigarette. 


Interviewer: You've indicated that we're supposed to know 
....about...(consults notes)....SCP- and SCP-_ . According to 
you, SCP- isa [DATA EXPUNGED}], capable of [DATA 
EXPUNGED]. And SCP- _ is supposed to be some sort of 
precognitive computer? 


Subject: Yes. | designed their containment procedures. I've been 
studying SCP- for two months when this assignment came up. I'd 
written up my notes on... 


Interview: As you've been told, there are no such SCP's. We've 
never heard of them. 


Subject: (unintelligible) 
Interviewer: What? 


Subject: | said 'you will'...you'll hear about them presently. You 
have field agents in ? That's where we find them. 


Interviewer: So you say. 
Subject: So | say... do you mind? 
Interviewer: Go ahead. 

Subject allowed another cigarette. 


Interviewer: You said before about the change you used to buy the 
soda...you didn't recognize who's on the dime. 


Subject: (tiredly) That's right. 

Interviewer: According to you, who's supposed to be on the dime? 
Subject: FDR. 

Interviewer: Yeah, well, that's who's on the dime. 


Subject: No it's...it's not...he's not in profile. Can't you remember? 
It's famous for being a strange...portrait, picture, whatever. With his 


characteristic ... leer? You know what | mean. 
Interview: / can say I... 


Subject: (yelling) Why are you doing this? Is this a psychological .... 
are you trying to disorient me, see how much it takes to make me... 


Interviewer: You know that's not true. 

Subject: (unintelligible) 

Interviewer: /t may be that the artifact has affected your memory. 
Subject: Sure. 

Interviewer: You think that's unlikely? 


Subject:...| don't know what | think. Can we....can we resume this 
tomorrow? | need to...| need some sleep. 


interviewer: Security will escort you to your quarters. Your security 
clearance is temporarily suspended. Let me emphasize ‘temporarily’. 
You are not to discuss these events with anyone. 


Subject: | just want to go to bed. 

Interviewer: Drop by the pharmacy. They'll give you something. 
Subject: | don't want a tranquilizer. 

Interviewer: Suit yourself. 


Closing statement: 
Polygraph results indicate responses are not consciously deceptive. 


Retrocausality Torus Interview B 


Interviewee: Subject 


Interviewer A: Dr 
Interviewer B: Asst. Researcher 


Observing, ex camera: Dr. , PhD in Psychology, Dr : 
PhD in Neurology 


Foreword: 

Following the 3rd trial, Subject was debriefed according to standard 
operating procedure. 

Unbeknownst to the subject, passive polygraph recording was in 
effect. Note: Subject emotionally labile and somewhat paranoid. 
Subject: Please tell me you remember what we discussed. 
Interviewer A: What's that? 

Subject: Which trial is this? 

Interviewer A: The third one, why? 

Subject: The third one? 

Interviewer A: Which one is it according to you? 
Subject: This is the nineteenth trial. 

Interviewer A: That's not possible. 

Subject: Let me save us some time. 


Interviewer A: By all means. 


Subject: You have identified and contained SCP- andSCP- ? 


Interviewer A: .../ can't discuss... 


Subject: ...then there's something you can check. | know you don't 
believe me, but the last time we did this, we found something 
strange having to do with...is it...the Kasmere force? 


(Interviewers confer with each other) 

Interviewer A: (to interviewer B) no, go ahead. 
Interviewer B: Do you mean the Casimir force? 
Subject: Yes. That's it. The artifact affects it. 

Interviewer B: How would you know something like that? 
Subject: Because | overheard you talking about it. 
Interviewer B: When would that have been? 


Subject: You don't remember. It's after the 17th trial. | want you to 
understand something. You keep thinking this thing affects my 
memories. That I'm mistaken. If that's the case, how could | know 
about SCP- andSCP- ? Once you double-check the effect I'm 
talking about, how will you explain that? 


Interviewer A: /f you... 


Subject: How will you explain that? Will you evolve a theory to 
cover that? You see, there are only two possibilities: either I'm 
crazy. Or I'm not. 


Interviewer A: We’re still trying to ascertain... 

Subject: Once you're convinced, we'll talk. Until then I'm done. Take 
me to my quarters and lock me up or let me go. 

(Interview suspended.) 


Several experiments performed using D-class personnel, 
immediately terminated 


after activating the artifact. Subject's experimental predictions 
confirmed. 


Note: Shortly thereafter, Asst. Researcher (who had assisted 
with this interview) 

performed an unsanctioned experiment with the artifact, using 
himself as a subject. 


No personnel could be located who had afterwards spoken to him, 
though it is known that 

he engaged in two hours of research using the unclassified 
Foundation database, at which point he 

placed a phone call to his mother. 


Although it's been established that while Asst. Researcher 

failed to actually reach her — though he tried 

at least a dozen times in as many minutes — he did repeatedly re- 
play her voicemail message. Shortly afterwards, 

Asst. Researcher committed suicide. 


(Interview resumed 50 hours later.) 


Subject: Where's your assistant? 

Interviewer: Reassigned. 

Subject: Well? 

Interviewer: Well what? 

Subject: You don't look like you've slept much. 
Interviewer: What is it that...that you'd have me believe? 


Subject: It's funny, every time we talk, | keep expecting you to 
remember. 


Interviewer: /'m asking you again, what is it you'd have me believe? 


Subject: In the twelve weeks I've been working with the artifact, 
[note: it had only been one week since experiments had begun] \'ve 


seen the Foundation change, the president change, the layout of the 
globe change, I've seen you change...you look better without the 
beard, incidentally...it's all gone. 


Interviewer: What's...