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"Last week&amp;#039;s Fringe dealt us a game-changing emotional blow, with Georgina Haig&amp;#039;s Etta making a shock exit after just four episodes - alright, five if you count season four&amp;#039;s futuristic prelude. But if you were looking for &amp;#039;An Origin Story&amp;#039; to scale things back and provide a little solace, then think again... We spend a little time exploring Peter and Olivia&amp;#039;s immediate trauma - there&amp;#039;s pained hugs, harrowing memories - but only a little. This episode doesn&amp;#039;t wallow in their grief but swiftly and surprisingly advances the season arc, as the Observers make their next move. The master race have been using a wormhole - or &amp;quot;shipping lane&amp;quot; - to transport parts from their own devastated future to 2036, with the ultimate aim of building another air degradation system that will dramatically reduce human lifespans.  When the resistance reaches out to our heroes, Peter (Joshua Jackson) channels his rage into an attack on the Observers, hoping to destroy the wormhole and stop the invaders&amp;#039; plans in their tracks. But Peter is becoming increasingly withdrawn - he&amp;#039;s on the edge and clearly in danger of teetering over it, lashing out at Olivia (Anna Torv) and ignoring advice from all sides regarding his reckless behaviour. Things only get worse when the resistance capture a lone Observer - while Peter stops short of going all Jack Bauer on his follically-challenged foe&amp;#039;s ass, he does subject his captive to a tense interrogation as he attempts to assemble a potentially unstable device.  Joshua Jackson&amp;#039;s terrific as a dark, tormented Peter - his best performance this season by a mile - and the actor playing the Observer also does solid work as his cold and impassive nemesis.  It all culminates in a tense sequence that sees our heroes seemingly strike a blow against the Observers, only to be denied even this meagre victory - Peter&amp;#039;s been played by his opponent and that&amp;#039;s enough to finally bring out the Bauer in our snarling, vicious lead. Peter&amp;#039;s spiralling out of control - just as Olivia&amp;#039;s coming to accept her loss, he&amp;#039;s still kicking out at the world and everyone in it, inserting Observer tech into his own skull in an attempt to gain an edge. What has Peter done to himself and what long-term consequences will his decision have?  Elsewhere this week, Walter&amp;#039;s (John Noble) contribution to the Observer plot is minimal, but he still serves a vital role as the emotional core of the episode, forcing Olivia to stop ignoring her pain, to look back, face it and only then move on. John Noble is of course brilliant as a man who knows the cost of attempting to shut out the loss of a child. &amp;#039;An Origin Story&amp;#039; might lack the shock value of &amp;#039;The Bullet That Saved the World&amp;#039; but Peter and Olivia&amp;#039;s ongoing trauma - his thirst for revenge, her quiet devastation - is more than enough to draw the viewer in. What&amp;#039;s more, the season arc moves forward in intriguing directions, with Peter&amp;#039;s transformation opening up a number of exciting new possibilities.  \u2022 This week&amp;#039;s Fringe glyphs spell out the word F I G H T. What did you make of &amp;#039;An Origin Story&amp;#039;? Leave your comments on the latest &amp;#039;Fringe&amp;#039; episode below! "^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.digitalspy.com/tv/fringe/review/a435684/fringe-recap-peters-on-the-warpath-in-an-origin-story/>