Of episode 13 "The Fix" at TvS. Takei!
Here's a snip, a mini-editorial on how I feel about George Takei being cast in the show:
Some viewers aren't looking to give Takei much of a chance, based on web chatter I've seen. I like Takei. He barely makes an appearance tonight, but the single shot of his stony visage as he stares down Hiro in fatherly disappointment is enough to make me willingly decide to forget Sulu for the purposes of enjoying Heroes. Takei is having a resurgence right now, and that is only part of a long and distinguished career. Meet him halfway. If the audience gives him the chance they would give any other well-known face in a new role I expect they will see he can do the character and the show justice.