is it me or do "ice" season 1 and "firewalker" in season 2, have basicaly the same plot

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i mean. scully mulder practically or the only ones to escape alive.
previously undiscovered lifeform from a previously unexplored enviroment takes people over with bad consequences.
inside volcano. inside ice core.
things like that.

almost like twin episodes.
that said i like them
but where they written by the same person or something?
any one else see this