  We study the Large $N$ dynamics of the $O(N)$ field theory in the Thermo
field dynamics approach. The question of recovering the high temperature phase
and the corresponding $O(N)$ gauging is clarified. Through the associated
bi-local representation we discuss the emergent bulk space-time and
construction of (Higher spin) fields. We note the presence of `evanescent'
modes in this construction and also the mixing of spins at finite temperature.
