original: In The Tomb of the Cybermen (1967), veins and brains were visible through the domed head of the Cyberman Controller and similarly, in Attack of the Cybermen (1985) and "The Age of Steel" (2006), the Cyber-Controller's brain is visible through the dome.
simplifications: In The Tomb of the Cybermen, veins and brains were seen through the domed head of the Cyberman Controller.  In Attack of the Cybermen and "The Age of Steel", the Cyber-Controller's brain is visible through the dome. In The Tomb of the Cybermen (1967), veins and brains were visible  through the head of the Cyberman Controller and in Attack of the Cybermen (1985) and "The Age of Steel" (2006). Veins and brains were visible through the domed head of the Cyberman Controller in he Tomb of the Cybermen (1967). Similar is seen in in Attack of the Cybermen (1985) and "The Age of Steel" (2006) In The Tomb of the Cybermen (1967), Attack of the Cybermen (1985), and "The Age of Steel" (2006), veins and brains could be seen through the domed head of the Cyberman Controller. In The Tomb of the Cybermen (1967), veins and brains were visible through the domed head of the Cyberman Controller. Similarly, in Attack of the Cybermen (1985) and "The Age of Steel" (2006), the Cyber-Controller's brain is visible through the dome. Veins and brains were visible through the domed head of the Cyberman Controller, In 1967 Tomb of the Cybermen and the 1985 Attack of the Cybermen; The Age of Steel" (2006), the Cyber-Controller's brain is visible through the dome. In a few episodes, the Cyberman Controller's brain is visible through its head. In The Tomb of the Cybermen (1967), Attack of the Cybermen (1985), and "The Age of Steel" (2006), the Cyber-Controller's brain and veins are visible through the domed head of the Cyberman Controller. In The Tomb of the Cybermen (1967), veins and brains were visible through the dome of the Cyberman Controller, and likewise, in Attack of the Cybermen (1985) and The Age of Steel (2006), the brain of the Cyber-Controller is visible thru the dome. In The Tomb of the Cybermen , from 1967, veins and brains were able to be seen through the domed head of the Cyberman Controller. Also, in Attack of the Cybermen, from 1985, and the Age of Steele, from 2006, the Cyber-Controller's brain is able to be seen through the dome.