Bernice Summerfield Timeline

Yes, it's kinda complicated at times. You try weaving through all the media. A lot of this is borrowed from the 3rd edition of Lance Parkin and Lars Pearson's Ahistory, but they omit the anthologies, which I find a bit suspect, personally, as it renders some aspects of Benny's ongoing adventures incoherent. Simon Guerrier's Bernice Summerfield: The Inside Story and many contributions to this thread on Gallifrey Base [note: link is members-only] were also useful.

• NA - The New Adventures novels, published by Virgin
• BFN - Big Finish Productions novels
• Aud - Single audio dramas, published by Big Finish
• Anth - Anthologies, published by Big Finish
• BX - Box sets of audio dramas, published by Big Finish
• NABS - The New Adventures of Bernice Summerfield audio box sets, published by Big Finish
• TSSF - The Story So Far audio box sets, published by Big Finish
  

2540
[Benny is born.]

2550s
Missing Adventures,‡ stories #1-3 (Anth XI)
"Ever After Happy" (TSSF #1.1)

2561
Genius Loci (BFN #8)

2562
Old Friends: "The Ship of Painted Shadows" (Anth IX)

early 2560s
Missing Adventures,‡ stories #4-10 (Anth XI)

2565
The Vampire's Curse: "The Badblood Diaries" (Anth XII)

late 2560s
Missing Adventures, stories #11-12 (Anth XI)

2570
Love and War (Doctor Who: Novel Adaptations #1)
[Benny begins traveling with the Doctor.]

2593
[Benny returns to her own time, give or take a generation.]
Oh No It Isn't! (NA #1) / Oh No It Isn't! (Aud #1.1)
Dragons' Wrath (NA #2)
Beyond the Sun (NA #3) / Beyond the Sun (Aud #1.2)
Ship of Fools (NA #4)

2594

Down (NA #5)

Deadfall (NA #6)

Ghost Devices (NA #7)

Mean Streets (NA #8)

Tempest (NA #9)

Walking to Babylon (NA #10) / Walking to Babylon (Aud #1.3)

Birthright (Aud #1.4)

Just War (Aud #1.5)

Oblivion (NA #11)

The Medusa Effect (NA #12)

Dry Pilgrimage (NA #13)

2595

The Sword of Forever (NA #14)

Buried Treasures (Aud)

Dragons' Wrath (Aud #1.6)
"The Grel Invasion of Earth" (TSSF #1.2)

Another Girl, Another Planet (NA #15)

Beige Planet Mars (NA #16)

Where Angels Fear (NA #17)

The Mary-Sue Extrusion (NA #18)

Dead Romance (NA #19)

2596

Tears of the Oracle (NA #20)

Return to the Fractured Planet (NA #21)

The Joy Device (NA #22)

Twilight of the Gods (NA #23)

2600

The Doomsday Manuscript (BFN #1)

The Dead Men Diaries,*‡ frame story (Anth I)

The Secret of Cassandra (Aud #2.1)

The Squire's Crystal (BFN #3)

The Gods of the Underworld (BFN #2)

The Stone's Lament (Aud #2.2)

The Extinction Event (Aud #2.3)

The Infernal Nexus (BFN #4)

The Skymines of Karthos (Aud #2.4)

The Glass Prison (BFN #5)

2601

The Greatest Shop in the Galaxy (Aud #3.1)

The Green-Eyed Monsters (Aud #3.2)

The Plague Herds of Excelis (Aud Excelis IV)

The Dance of the Dead (Aud #3.3)

A Life of Surprises*‡ (Anth II)

The Mirror Effect (Aud #3.4)

2602

The Bellotron Incident (Aud #4.1)

The Draconian Rage (Aud #4.2)

The Poison Seas (Aud #4.3)

Life During Wartime (Anth III)

Death and the Daleks,† main story (Aud #4.4)

The Big Hunt (BFN #6)
A Christmas Treasury: "...Be Forgot" (Doctor Who: Short Trips #11)

2603

The Grel Escape (Aud #5.1)

A Life Worth Living‡ (Anth IV)
"Braxiatel in Love" (TSSF #1.3)

2604

The Bone of Contention (Aud #5.2)

The Relics of Jegg-Sau (Aud #5.3)

Silver Lining (Aud Doctor Who Magazine, no. 351)

The Masquerade of Death (Aud #5.4)

The Heart's Desire (Aud #6.1)

2605

A Life in Pieces (Anth V)

The Tree of Life (BFN #7)

The Kingdom of the Blind (Aud #6.2)
100: "The 100 Days of the Doctor" (The Audio Adventures of Doctor Who #100)
"Every Dark Thought" (TSSF #2.1)

2606

The Goddess Quandary, main story (Aud #6.4)

Parallel Lives (Anth VI)

Something Changed‡ (Anth VII)

The Lost Museum (Aud #6.3)

The Crystal of Cantus, main story (Aud #6.5)

Death and the Daleks, frame story (Aud #4.4)

The Goddess Quandary,† frame story (Aud #6.4)

The Crystal of Cantus,† frame story (Aud #6.5)

Collected Works, prologue (Anth VIII)

The Tartarus Gate (Aud #7.1)

Collected Works, stories #1-4 (Anth VIII)

Timeless Passages (Aud #7.2)

2607

Collected Works, stories #5-12 (Anth VIII)

The Worst Thing in the World (Aud #7.3)

Collected Works,† stories #13-20 (Anth VIII)

Summer of Love (Aud #7.4)

Collected Works, stories #21-23 (Anth VIII)
Old Friends,† frame story (Anth IX)

The Oracle of Delphi (Aud #7.5)
The Empire State (Aud #7.6)

The Tub Full of Cats (Aud #8.1)
The Judas Gift (Aud #8.2)
Freedom of Information (Aud #8.3)
Nobody's Children (Anth X)
The Two Jasons (BFN #9)
Jason Kane: The End of the World (Aud #8.4)
The Final Amendment (Aud #8.5)
The Wake (Aud #8.6)

2608
Beyond the Sea (Aud #9.1)
The Adolescence of Time (Aud #9.2)
The Adventure of the Diogenes Damsel (Aud #9.3)

2609
The Vampire's Curse:† "Predating the Predators" (Anth XII) 
The Diet of Worms (Aud #9.4)
Glory Days (Aud #10.1)
Absence (Aud #10.2)
Venus Mantrap (Aud #10.3)
Secret Origins (Aud #10.4)
The Company of Friends: "Benny's Story" (The Audio Adventures of Doctor Who #123)

Secret Histories,* frame story (Anth XIII)

2610
Dead and Buried (webcast)
Resurrecting the Past (Aud #11.1)
Present Danger (Anth XIV)
Escaping the Future (Aud #11.2)

Year 54
Year Zero (Aud #11.3)
Dead Man's Switch (Aud #11.4)

Year 57
Epoch: "The Kraken's Lament" (BX #1.1)
Epoch: "The Temple of Questions" (BX #1.2)
Epoch: "Private Enemy No. 1" (BX #1.3)

2616
Epoch: "Judgement Day" (BX #1.4) 

2617
Road Trip: "Brand Management" (BX #2.1)
The Weather On Versimmon (BFN)
"Empress of the Drahvins" (TSSF #2.2)
Road Trip: "Bad Habits" (BX #2.2)
Adorable Illusion (BFN)
Road Trip: "Paradise Frost" (BX #2.3)
Legion: "Vesuvius Falling" (BX #3.1)

2618
"The Revolution" (NABS #1.1)
"Good Night, Sweet Ladies" (NABS #1.2)
"Random Ghosts" (NABS #1.3)
"The Lights of Skaro" (NABS #1.4)
Legion: "Shades of Gray" (BX #3.2)
Legion: "Everybody Loves Irving" (BX #3.3)
The Slender-Fingered Cats of Bubastis (BFN)

2619
Many Happy Returns (Aud)
New Frontiers: "A Handful of Dust" (BX #4.1)
Filthy Lucre (BFN)
New Frontiers: "HMS Surprise" (BX #4.2)
New Frontiers: "The Curse of Fenman" (BX #4.3)

Missing Persons: "Big Dig" (BX #5.1)

Missing Persons: "The Revenant's Carnival" (BX #5.2)

Missing Persons: "The Brimstone Kid" (BX #5.3)

Missing Persons: "The Winning Side" (BX #5.4)

Missing Persons: "In Living Memory" (BX #5.5)
The Glamour Chase: Big Bang Generation (Doctor Who New Series Adventure #56)

 

2620s (?)

The Worlds of Big Finish: "The Phantom Wreck"/"The Lady from Callisto" (Aud)
"Ever After Happy"† (TSSF #1.1)
The Triumph of Sutekh: "The Pyramid of Sutekh" (NABS #2.1)

The Triumph of Sutekh: "The Vaults of Osiris" (NABS #2.2)

The Triumph of Sutekh: "The Eye of Horus" (NABS #2.3)

The Triumph of Sutekh: "The Tears of Isis" (NABS #2.4)

Lockdown!: "Shadow of a Doubt" (webcast)
The Unbound Universe: "The Library in the Body" (NABS #3.1)

 

The Unbound Universe

The Unbound Universe: "Planet X" (NABS #3.2)

The Unbound Universe: "The Very Dark Thing" (NABS #3.3)

The Unbound Universe: "The Emporium at the End" (NABS #3.4)

True Stories (Anth)
The Christmas Collection* (Anth)

In Time* (Anth)

Ruler of the Universe: "The City and the Clock" (NABS #4.1)

Ruler of the Universe: "Asking for a Friend" (NABS #4.2)

Ruler of the Universe: "Truant" (NABS #4.3)

 

New Adventures in Time and Space

Ruler of the Universe: "The True Saviour of the Universe" (NABS #4.4)
Buried Memories: "Pride of the Lampian" (NABS #5.1)
Buried Memories: "Clear History" (NABS #5.2)
Buried Memories: "Dead and Breakfast" (NABS #5.3)
Buried Memories: "Burrowed Time" (NABS #5.4)
Lost in Translation: "Have I Told You Lately?" (NABS #6.1)
Lost in Translation: "The Undying Truth" (NABS #6.2)
Lost in Translation: "Inertia" (NABS #6.3)
Lost in Translation: "Gallifrey" (NABS #6.4)
"The Angel of History" (TSSF #2.3)
Blood and Steel: "Wilkommen" (NABS #6.1)
Blood and Steel: "Wulf" (NABS #6.2)
Blood and Steel: "Übermensch" (NABS #6.3)
Blood and Steel: "Auf Wiedersehen" (NABS #6.4)

 

52nd Century

"Lies in Ruins" (Doctor Who: The Legacy of Time #1)

* Stories in this collection take place at various points in Benny's life, but it is "centered" here.
† This entry has multiple listings because it is fragmented in terms of time, but this is where it is best experienced as a whole.
‡ Contains a story (or stories) later released in Treasury (Anth). If you want a place to listen to all of Treasury in one go without spoiling anything, I would do it based on the chronologically latest story (Something Changed).