The Enterprise returns to Delta Vega, where Captain Kirk learns that his old friend Gary Mitchell is still very much alive.
A tribe of Neanderthals with highly advanced technology lives in Alaska; S.I.A director Gaskell wants to take all their stuff.
While dealing with a TARDIS-related mystery, the Doctor encounters a masked pyromaniac. Also includes two back up stories featuring Sontarans and the Celestial Toymaker.
SuperPro must contend with a corrupt sports agent named Hal Leech and the minor supervillain Constrictor.