What episode(s) do Naruto's friends find out he holds the Kyuubi..?

its never really dicho but i think tsunade told sakura and the orichumaru told sasuke. Then first time they saw the charka was when they faced haku which would be like episode 20 o around there

Yup,

link

they all find out while narutos training it spreads throughout his friends i know for a fact they know por then