The Wheel in Space - 1968

Troughton-era Cyberman didn’t waste time threatening to ‘assimilate’ everyone whilst posturing in perfectly choreographed unison.

They simply killed you until you were dead, and then killed you some more.

This solitary Cyberman barely breaks step as he totally mangles Chuck Norris.*

Yep, the Cybermen of the 1960s were the scariest.

                                             *This might not actually be Chuck Norris