In Dr. Who, the Time Lords used a black hole as a ‘mysterious energy source’.
Same for the Ori in the SG-1 episode Beachhead (transcript here; summary and transcript of prior black-hole episode here and here, which may partly explain the writers’ thinking).
Same for the Ori in the SG-1 episode Beachhead (transcript here; summary and transcript of prior black-hole episode here and here, which may partly explain the writers’ thinking).