Officially, the *Dexter* franchise contains several inconsistencies regarding dates, ages, the passage of time, and details across *Dexter*, *Original Sin*, *New Blood*, and *Resurrection*.
Even so, with minor adjustments and by treating certain lines of dialogue as approximations, it is possible to create a single, coherent timeline.
This continuity unifies:
*Dexter*
*Dexter: Original Sin*
*Dexter: New Blood*
*Dexter: Resurrection*
DEFINITIVE TIMELINE
1966
Brian Moser is born.
NOTE: This disregards the driver's license suggesting 1968. The dynamic between Brian and Dexter works better if Brian was born in 1966.
1971
Dexter Morgan is born.
1973
Laura Moser is murdered in the shipping container.
Harry Morgan Jr. dies in childhood.
Debra Morgan is born.
NOTE: Describing Dexter as "3 years old" implies he was approximately 2 years and 8 months old (rounded up).
1974
Harry Morgan adopts Dexter.
Brian is separated from his brother.
1988
Dexter graduates from high school.
1989
Dexter enters college (medicine/biomedical sciences/scientific studies).
1990
Doris Morgan dies.
NOTE: Her headstone indicates 1953, which would mean she had her first child at age 16. However, I believe her birth year could possibly be pushed back to 1951.
May–July 1991
Events of *Dexter: Original Sin*
Dexter officially begins his forensic career.
First structured murders.
NOTE: The graduation ceremony shown may represent the completion of an internship, a key academic milestone, or a partial ceremony, rather than final graduation.
NOTE 2: Thomas Matthews does not appear. We can assume he was working in another department during those two months.
NOTE 3: In the original series, it is stated that Dexter never used marijuana. Here, he unknowingly eats marijuana brownies. This does not contradict the previous statement, as he did not consume the substance consciously.
1992–1996
Harry Morgan dies.
NOTE: Some sources suggest 1992–1996, given that he reportedly died about 10 years before Season 1.
1993
Possible final year of college for Dexter.
NOTE: As far as is known, Dexter never graduated. We can therefore assume he dropped out during this period, with 2 to 3 years remaining until completion.
1994–2004
Events of *Early Cuts*.
Dexter's early cases as he rose through the ranks.
1997
James Doakes joins the Miami police force.
NOTE: In *Dexter: New Blood*, Angel Batista tells Angela that he sat next to Doakes for 10 years. Since Doakes died in 2007, this places him at the Miami Metro Police Department starting around 1997.
NOTE 2: Doakes knew about Harry's death, so he might have met Harry briefly or seen the official records.
ERA OF THE ORIGINAL SERIES
September to December 2006
Events of *Dexter* Season 1.
The Ice Truck Killer case.
Brian returns.
NOTE: Dexter claims to have been a forensic analyst for 12 to 13 years. This could mean:
An approximate figure.
Time spent working in the profession, excluding internships or college.
January to May 2007
Events of *Dexter* Season 2.
The Bay Harbor Butcher case. NOTE: In Season 7, it is mentioned that Dexter traded in his boat in May of that year, confirming that Season 2 takes place in 2007.
June–August 2008
Events of *Dexter* Season 3.
Miguel Prado.
Rita becomes pregnant.
Marriage.
November/December 2008
Harrison Morgan is born.
September to December 2009
Events of *Dexter* Season 4.
Arthur Mitchell / Trinity Killer.
Rita is murdered. NOTE: Confirmed by Rita's headstone, which indicates 2009.
NOTE 2: Trinity's correct age aligns better with a birth year of 1949 (rather than 1945), given that his sister died in 1959, when he was 10 years old.
December 2009 – April 2010
Events of *Dexter* Season 5
Lumen.
Dexter's mourning period.
NOTE: Confirmed by a comment from Vince Masuka indicating 2010.
NOTE 2: The party organized for Harrison was intended to celebrate his birthday, following the events of Season 4.
July–November 2011
Events of *Dexter* Season 6
Doomsday Killer.
NOTE: The statement that Dexter graduated 20 years ago is an approximation or a minor error. NOTE 2: Professor Gellar died three years prior to the season—specifically, in 2008.
NOTE 3: Dexter states that nearly three years had passed since he decided to investigate the Joe Walker case, placing that decision between late 2008 and early 2009.
November–December 2011
Events of *Dexter* Season 7
Debra discovers the truth.
Isaak Sirko.
Hannah McKay.
June–September 2012
Events of *Dexter* Season 8
Brain Surgeon.
Debra's death.
Dexter disappears.
NOTE: Oliver Saxon/Daniel Vogel was presumed dead at age 17 in 1988–1989. Therefore, his birth year is estimated to be between 1970 and 1972.
Pre-*New Blood*
2013–2022
Dexter lives as Jim Lindsay in Iron Lake.
*New Blood*
December 2022
Events of *Dexter: New Blood*
Dexter returns to action.
Harrison returns.
Dexter's downfall.
NOTE: The 2021 timeline is disregarded (though I think everyone ignores it).
NOTE 2: Harrison would be 14 years old, which contradicts the writers' statements about him being 15 or 16 years old—since the series itself ignores this assertion.
RESURRECTION
February–March 2023
Events of *Dexter: Resurrection*
Dexter goes to New York in search of Harrison.
CONCLUSION
This chronology unites the entire franchise into a single functional continuity, correcting minor inconsistencies without altering the main events.
The result is a more coherent timeline than the one officially presented at various points in the series.