Cepheus Universal also has a section on time travel.

On Wed, Mar 11, 2026 at 4:57 PM Richard Aiken - raikenclw at gmail.com
(via tml list) <xxxxxx@simplelists.com> wrote:
>
> You're welcome!
>
> Richard Aiken
>
> "Never insult anyone by accident."  Robert A. Heinlein
> "I studied the Koran a great deal. I came away from that study with the conviction there have been few religions in the world as deadly to men as Muhammed." Alexis de Tocqueville
> "We know a little about a lot of things; just enough to make us dangerous." Dean Winchester (fictional monster hunter portrayed by Jensen Ackles)
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>
> On Wed, Mar 11, 2026, 3:58 PM Timothy Collinson - Timothy.Collinson at port.ac.uk (via tml list) <xxxxxx@simplelists.com> wrote:
>>
>> Not heard of that, so thanks for the heads up.
>>
>> tc
>>
>> Sent from Outlook for Android
>> ________________________________
>> From: xxxxxx@simplelists.com <xxxxxx@simplelists.com> on behalf of Richard Aiken - raikenclw at gmail.com (via tml list) <xxxxxx@simplelists.com>
>> Sent: Wednesday, March 11, 2026 5:38:19 PM
>> To: tml <xxxxxx@simplelists.com>
>> Cc: Jeff Zeitlin <xxxxxx@freelancetraveller.com>
>> Subject: Re: [TML] Time Traveller
>>
>> Although it has ZERO connection to Traveller, I highly recommend the game "Continuum: Roleplaying In The Yet" for its unique take unified on the intricacies and complications of time travel.
>>
>> Richard Aiken
>>
>> "Never insult anyone by accident."  Robert A. Heinlein
>> "I studied the Koran a great deal. I came away from that study with the conviction there have been few religions in the world as deadly to men as Muhammed." Alexis de Tocqueville
>> "We know a little about a lot of things; just enough to make us dangerous." Dean Winchester (fictional monster hunter portrayed by Jensen Ackles)
>> "These men with me are here to vote. They care a lot less about dying than you do." Newton Knight (as portrayed by Matthew McConaughey), to a set of Redeemer poll watchers.
>>
>>
>>
>> On Wed, Mar 11, 2026, 12:26 PM Timothy Collinson - Timothy.Collinson at port.ac.uk (via tml list) <xxxxxx@simplelists.com> wrote:
>>
>>
>> Hi there,
>>
>> Jeffrey is right, Book 4: Psion is "the" Mongoose place to look for time travel (lots of mentions), although it also gets one mention in Book 5: Agent as a prototype special ability (p.96) as well as LBB9: Library Data as something that Imperial Research is looking into amongst a host of other things.  A couple of patrons in the first edition of 760 Patrons use time travel as well.  Supplement 9: Campaign Guide has a temporal anomaly as a Space Event, offers time machines as Ancient Artefact in three entries of a d66 table and makes time travel a 'Discovery' on another d66 table with three possible options.  Perhaps more obscurely and less canonly (is that a word?) there's an encounter in Compendium 2 with Viridia who might use time travel to stop the PCs tracking down an alien temple - although it does specifically call out her powers as NOT being available in the Core Rulebook.  Supplement 15: Powers & Principalities has the most 'sensible' use of it in the LifeTimers organization cryogenically freezing clients to "give ultimate security for every time-traveller", but probably not what anyone really means by time travel.
>>
>> It also crops up in 'alternate' universe books such as Judge Dredd and Strontium Dog.
>>
>> However, I'm really struggling to think of any mention of in Mongoose 2nd edition except for the negative mention in one of the Deepnight Revelation books.  Hang on.... here it is, Book 3: Referee's Handbook:
>>
>> ///quote
>> Each point of DEI assigned to a task adds DM+3 on all checks to accomplish the task, including those made by people outside the inspired group if their efforts would help. Each point of CEI assigned allows an attempt to overcome a near-impossible problem. This does not allow the Travellers to invent time travel or wish an enemy out of existence, but almost any physically possible task can be attempted and almost any problem circumvented. However, this comes at a price.
>> ///endquote
>>
>>
>> I don't know if any of that helps.
>>
>> tc
>>
>> (CCd to Jeff originating the question as TML still refusing my emails sometimes)
>>
>> ________________________________
>> From: xxxxxx@simplelists.com <xxxxxx@simplelists.com> on behalf of Jeffrey Schwartz - schwartz.jeffrey at gmail.com (via tml list) <xxxxxx@simplelists.com>
>> Sent: 10 March 2026 23:32
>> To: xxxxxx@simplelists.com <xxxxxx@simplelists.com>
>> Subject: Re: [TML] Time Traveller
>>
>> My Google Fu says:
>> Psionics & Temporal Manipulation: The Mongoose Book 4: Psion (1st Ed) covers time travel through advanced psionic talents. It introduces the Science (Temporal) skill and careers such as the Temporal Agent, Time Warden, Time Monitor, or Timestream Nomad.
>>
>> Is that what you were thinking?
>>
>> On Tue, Mar 10, 2026 at 7:24 PM Jeff Zeitlin - editor at freelancetraveller.com (via tml list) <xxxxxx@simplelists.com> wrote:
>>
>> I recall that in one revision of one of the Mongoose Traveller books - I
>> think for 2e, but I don't recall and therefore will not make oath on it -
>> there was career information for roles that assumed that time travel was A
>> Thing.
>>
>> Can someone point me to the correct reference?
>>
>>
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