(Note: All time stamps are from Netflix. Lost is currently available on Hulu, and these exact time stamps may or may not be the same there, so sorry for any inconvenience.)
1st Century
6x15- Across the Sea (00:00-40:59)- Jacob and Samuel begin thier feud
6x15- Across the Sea (41:13-41:24)
6x15- Across the Sea (41:35-41:47)
6x15- Across the Sea (42:06-end)
1867
6x09- Ab Aeterno (06:03-15:40)- Richard Alpert's life is ruined
5x16- The Incident, Part 1 (00:00-03:39)- Jacob brings Richard to the Island
6x09- Ab Aeterno (15:41-39:45)- Richard meets Samuel and Jacob
6x09- Ab Aeterno (45:18-end)
1954
5x03- Jughead (12:08-13:05)- Jacob's People receive visitors
5x03- Jughead (18:05-19:49)
5x03- Jughead (25:26-27:07)
5x03- Jughead (28:16-32:47)
5x03- Jughead (35:46-37:17)
5x03- Jughead (39:40-41:14)
1956
4x11- Cabin Fever (00:00-02:25)- John Locke is born
4x11- Cabin Fever (00:25-11:01)
1961
4x11- Cabin Fever (12:29-16:33)- Richard tests Locke
1963
3x20- The Man Behind the Curtain (00:57-03:05)- Ben Linus is born
1973
3x20- The Man Behind the Curtain (06:46-09:34)- Ben joins the Dharma Initiative
4x11- Cabin Fever (22:38-24:37)- Locke rejects his recruitment
3x20- The Man Behind the Curtain (13:00-15:30)- Ben learns of the Island's inhabitants
3x20- The Man Behind the Curtain (17:16-20:22)
3x20- The Man Behind the Curtain (23:23-27:15)
1974
5x08- LeFleur (12:50-18:15)- LeFleur's group arrives on the Island
5x08- LeFleur (22:03-24:25)
5x08- LeFleur (25:50-34:00)
1975
1x05- White Rabbit (00:00-00:35)- Jack Shephard gets beat up
1x05- White Rabbit (10:44-12:34)
1976
1x16- Outlaws (01:10-02:43)- James Ford looses his parents
5x16- The Incident, Part 1 (13:37-16:19)- James meets Jacob
5x10- He's Our You (01:07-03:15)- Sayid Jarrah becomes a man
1977
5x08- LeFleur (04:20-09:15)- LeFleur finds his friends
5x08- LeFleur (18:20-22:00)
5x08- LeFleur (35:45-end)
5x09- Namaste (09:15-13:07)- Dharma captures a Hostlle
5x09- Namaste (15:56-17:15)
5x09- Namaste (18:47-20:32)
5x09- Namaste (21:16-23:26)
5x09- Namaste (26:19-31:34)
5x09- Namaste (34:53-end)
5x10- He's Our You (03:16-05:07)- Dharma decides the fate of the Hostile
5x10- He's Our You (07:31-12:58)
5x10- He's Our You (14:12-16:09)
5x10- He's Our You (18:20-21:38)
5x10- He's Our You (24:49-28:40)
5x10- He's Our You (28:41-31:25)
5x10- He's Our You (32:49-37:20)
4x10- He's Our You (39:05-end)
5x11- Whatever Happened, Happened (01:22-04:50)- Dharma tries to save Ben
5x11- Whatever Happened, Happened (09:08-12:05)
5x11- Whatever Happened, Happened (13:23-14:10)
5x11- Whatever Happened, Happened (15:58-16:30)
5x11- Whatever Happened, Happened (16:50-19:03)
5x11- Whatever Happened, Happened (20:59-23:35)
5x11- Whatever Happened, Happened (26:09-27:20)
5x11- Whatever Happened, Happened (29:29-30:35)
5x11- Whatever Happened, Happened (38:57-41:44)
5x12- Dead is Dead (00:00-03:26)- Ben meets Charles Widmore
5x13- Some Like it Hoth (02:35-06:57)- Dharma discovers Ben is missing
5x13- Some Like it Hoth (09:33-15:00)
5x13- Some Like it Hoth (17:40-22:15)
5x13- Some Like it Hoth (25:29-28:00)
5x13- Some Like it Hoth (35:47-37:40)
5x13- Some Like it Hoth (40:37-42:30)
5x01- Because You Left (00:44-02:50)- Pierre Chang goes to work
5x14- The Variable (06:06-07:33)- Daniel Faraday returns to the Island
5x01- Because You Left (03:00-04:17)- Dr. Chang talks about time
5x14- The Variable (09:47-11:04)- Daniel sets a chain of events in motion
5x14- The Variable (14:24-16:46)
5x14- The Variable (20:59-27:33)
5x14- The Variable (30:07-33:38)
5x14- The Variable (39:44-end)
5x15- Follow the Leader (02:20-03:28)- Dharma moves toward the Incident
5x15- Follow the Leader (09:47-11:40)
5x15- Follow the Leader (12:59-20:09)
5x15- Follow the Leader (25:02-27:40)
5x15- Follow the Leader (31:33-34:00)
5x15- Follow the Leader (36:38-39:16)
5x15- Follow the Leader (39:50-40:45)
5x16- The Incident, Part 1 (05:45-09:21)- The Incident occurs
5x16- The Incident, Part 1 (16:45-19:44)
5x16- The Incident, Part 1 (22:24-27:25)
5x16- The Incident, Part 1 (28:32-29:10)
5x16- The Incident, Part 1 (41:29-42:30)
5x17- The Incident, Part 2 (00:20-01:02)
5x17- The Incident, Part 2 (11:21-12:40)
5x17- The Incident, Part 2 (14:00-14:35)
5x17- The Incident, Part 2 (18:02-19:52)
5x17- The Incident, Part 2 (26:40-33:11)
5x17- The Incident, Part 2 (40:30-42:26)
1981
5x17- The Incident, Part 2 (08:52-09:45)- Juliet Burke's parents divorce
1982
3x05- The Cost of Living (00:54-02:30)- Mr. Eko steals crackers
2x10- The 23rd Psalm (00:52-03:48)- Eko begins the wrong path
1985
5x13- Some Like it Hoth (00:00-02:34)- Miles Straume learns of his ability
3x21- Greatest Hits (10:32-11:43)- Charlie Pace learns to swim
1986
3x02- The Glass Ballerina (00:30-01:55)- Sun Piak tells a lie
1987
5x16- The Incident, Part 1 (03:40-05:42)- Kate Austen meets Jacob
3x10- Tricia Tanaka is Dead (00:00-02:56)- Hugo Rayes's dad leaves
1988
5x14- The Variable (03:32-05:47)- Daniel Faraday has a destiny
5x04- The Little Prince (36:40-37:40)- Jin Kwon is found by the French Team
5x04- The Little Prince (40:17-end)
5x05- This Place is Death (03:06-15:37)- Jin meets Daniel Rousseau
5x12- Dead is Dead (06:58-08:58)- Ben kidnaps Alex Rousseau
5x12- Dead is Dead (15:48-17:44)
1991
2x14- One of Them (01:10-04:19)- Sayid is captured by Americans
2x14- One of Them (07:19-08:53)
2x14- One of Them (14:10-16:47)
2x14- One of Them (22:51-26:23)
2x14- One of Them (39:50-42:05)
1x19- Deus Ex Machina (00:29-01:39)- Locke meets his parents
1x19- Deus Ex Machina (05:14-07:22)
1x19- Deus Ex Machina (11:06-14:49)
1x19- Deus Ex Machina (19:30-20:41)
1x19- Deus Ex Machina (24:59-25:42)
1x19- Deus Ex Machina (27:41-28:12)
1x19- Deus Ex Machina (37:19-41:19)
1992
2x03- Orientation (03:08-05:43)- Locke meets Helen
2x03- Orientation (08:39-11:20)
2x03- Orientation (21:06-23:24)
2x03- Orientation (29:57-32:23)
3x20- The Man Behind the Curtain (34:08-40:12)- Ben commits The Purge
1993
5x12- Dead is Dead (24:03-25:55)- Ben banishes Charles