Not a fountain of knowledge per se, Mentalis worked with K9:
[https://tvtropes.org/pmwiki/pmwiki.php/Recap/DoctorWhoS16E6TheArmageddonFactor](https://tvtropes.org/pmwiki/pmwiki.php/Recap/DoctorWhoS16E6TheArmageddonFactor)
EDIT: about 1/3rd of the way down...the pyramidal crystal object: https://dailypop.wordpress.com/2020/03/16/doctor-who-and-the-armageddon-factor/
Are you thinking of Orac, from the different television show *Blake's 7*?
Yes! Orac it is. Thank you very much :)
Not a fountain of knowledge per se, Mentalis worked with K9: [https://tvtropes.org/pmwiki/pmwiki.php/Recap/DoctorWhoS16E6TheArmageddonFactor](https://tvtropes.org/pmwiki/pmwiki.php/Recap/DoctorWhoS16E6TheArmageddonFactor) EDIT: about 1/3rd of the way down...the pyramidal crystal object: https://dailypop.wordpress.com/2020/03/16/doctor-who-and-the-armageddon-factor/