Season One	Season Two
101. Wheel of Fortune	201. Valley of the Shadow
102. What it Seems	202. Descent
103. Quality of Life	203. Ascent
104. Enigma	204. The Outsider
105. Unreasonable Doubt	205. Precipitate
106. The House	206. Scars
107. Enemy Mind	207. Misbegotten
108. Netherworld	208. Cabin Pressure
109. The Siege	209. The Man Who Never Was
110. Here There Be Monsters	210. Dead Men Tell Tales
111. Dinner with Dana	211. Playing God
112. Shaman	212. Zion
113. Destiny	213. The Storm
	214. Plague
	215. Deja Voodoo
	216. The Hunt
	217. The Mountain
	218. The Combination
	219. Visions
Season Three	Season Four
301. Finding Rachel, Part 1	401. Broken Circle
302. Finding Rachel, Part 2	402. The Collector
303. Collision	403. Double Vision
304. Cold Hard Truth	404. Still Life
305. Total Awareness	405. Heroes & Demons
306. No Questions Asked	406. The Last Goodbye
307. Looking Glass	407. Grains of Sand
308. Speak Now	408. Vanguard
309. Cycle of Violence	409. Babble On
310. Instinct	410. Coming Home
311. Shadows	411. Saved
312. Tipping Point, Part 1	412. A Very Dead Zone Christmas
313. Tipping Point, Part 2
Season Five
501. Forbidden Fruit
502. Independence Day
503. Panic
504. Articles of Faith
505. The Inside Man
506. Lotto Fever
507. Symmetry
508. Vortex
509. Revelations
510. Into the Heart of Darkness
511. The Hunting Party