Re: star trek temporal agents vs Timelords
The Doctor did use a time ring to go from Skaro to Nerva Beacon, it acted like a TARDIS without actually being a TARDIS.
The greatest science fiction series of all time is
Doctor Who! And I'll take you all on, one-by-one
or all in a bunch to back it up!"
--- Harlan Ellison, from his introduction
to the PINNACLE series of Doctor Who books