I love this comment from Entertainment Weekly’s Marc Bernardin:
First on my list: kill Mohinder Suresh. Not only does he no longer serve a real purpose; he doesn’t even act like a real character. In the span of a single episode, he went from being a semi-faithful company lapdog to a rebel without a syringe to a slightly more cautious lapdog. And why didn’t he leave Bob’s slimy clutches? Because Molly was still recovering from Papa Parkman’s crazy brain drain. But if the Company isn’t getting her better, then why can’t Suresh take her out of there? She was just as unconscious on his couch. Why? Because the story needs Suresh to be there. That’s the worst kind of storytelling, when you force a character to betray himself to obey the dictates of plot. And once a character does that, he’s useless.
The article as a whole is good too.
There’s also this comment from Jeff Jensen, also of Entertainment Weekly:
The roller-coaster pacing has grown sluggish, the crazy-cool cliffhangers have gone MIA, and wimpy rookies like Wonderless Twins Maya and Alejandro have stolen away too much screen time. Plus the amnesia for Peter: so cliché. And Matt and Suresh as My Two Dads: seriously? Worst of all, stranding Hiro in a truly unconvincing evocation of feudal Japan has been disastrous.