In The Tomb of the Cybermen -LRB- NUMBER@1 -RRB- , veins and brains were visible through the domed head of the MISC@1 and similarly , in Attack of the MISC@2 -LRB- NUMBER@2 -RRB- and `` The Age of Steel '' -LRB- NUMBER@3 -RRB- , the PERSON@1 's brain is visible through the dome .

In The Tomb of the Cybermen -LRB- NUMBER@1 -RRB- , veins were visible through the circular head of the MISC@1 and in Attack of the MISC@2 -LRB- NUMBER@2 -RRB- and `` The Age of Steel '' -LRB- NUMBER@3 -RRB- , the PERSON@1 's brain is visible through the dome .
