Highlights from TeV Extragalactic Sources
  The number of discovered TeV sources populating the extragalactic sky in 2017
is nearly 70, mostly blazars located up to a redshift ~1. Ten years ago, in
2007, less than 20 TeV emitters were known, up to a maximum redshift of 0.2.
This is a major achievement of current generation of Cherenkov telescopes
operating in synergy with optical, X-ray, and GeV gamma-ray telescopes. A
review of selected results from the extragalactic TeV sky is presented, with
particular emphasis on recently detected distant sources.
