when he commented the episode was "better than any movie you're going to see in the theater right now". Hanson thought the mystery produced "surprises around every corner". IGN's Ramsey Isler rated the episode 8.0/10, explaining he enjoyed the "classic Fringe" opening scene, the "decent [acting] job" by Ruck, and John Noble's performance; he also thought the script was "very clever [as] it reveals surprising story elements with innovative tricks". Isler wasn't sure what to make of the Bell-Olivia plot twist however, commenting that "this new William Bell thing is either going to end up as the best plot device of the season, or the cheesiest thing in recent sci-fi history". Billy Grifter from Den of Geek was slightly disappointed with the "mad scientist" storyline as he felt it had been done before, but found several redeeming qualities: Alan Ruck's performance and the last five minutes featuring Noble and Blair Brown, and Torv with Joshua Jackson. Grifter thought the Noble-Brown scene was "actually very funny," praising the two actors' performances, and added that this humor made the following Torv-Jackson scene's impact "even greater". Referring to Torv's "passable" Nimoy impression, Grifter concluded that "the strength of Fringe is that it can take a rather light and fluffy premise, like the one in "Os", and embellish it with wonderful character moments and a genuine surprise or two". References External links "Os" at Fox.com Fringe (season 3) episodes 2011 American television episodes Physics in fiction