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Thomas E. Jackson (July 4, 1886 – September 7, 1967) was an American stage and screen actor. His 67-year career spanned eight decades and two centuries, during which time he appeared in over a dozen Broadway plays, produced two others, acted in over a 130 films, as well as numerous television shows. He was most frequently credited as Thomas Jackson and occasionally as Tom Jackson or Tommy Jackson.
Description above from the Wikipedia article Thomas Jackson (actor), licensed under CC-BY-SA, full list of contributors on Wikipedia.

Mystery of the Wax Museum
Detective at Morgue
64

Big Town
Police Chief Berkley
48

Name the Woman
Frank Martin
0

Little Caesar
Sergeant Flaherty
69

Dead End
Police Lieutenant at Killing (uncredited)
70

Manhattan Melodrama
Asst. Dist. Atty. Richard Snow
69

The Guilty
Tim McGinnis
54

Circumstantial Evidence
Detective
48

The Amazing Dr. Clitterhouse
Inspector Connors (uncredited)
71

The Mysterious Mr. Valentine
Police Lt. Milo Jones
40

The Woman in the Window
Inspector Jackson
73

No More Women
Detective
40

The Face of Marble
Inspector Norton
44

The Hidden Eye
Insp. Delaney (as Thomas Jackson)
76

The Last Days of Pompeii
The Lanista (uncredited)
56

Terror Aboard
Capt. Derick Alison
60

Valley of the Zombies
Detective Blair
52

Mystery of the White Room
Sergeant Macintosh Spencer (as Thomas Jackson)
0

Broadway
Dan McCorn
56

Big City Blues
Detective Quelkin
53

Blondes at Work
Parker
61

Parachute Jumper
Detective Lt. Coffey
58

Here Comes Trouble
Chief McClure (as Thomas Jackson)
46

Torchy Gets Her Man
Henchman Gloomy (as Tommy Jackson)
56
Reckless Living
McManus
30
I'd Give My Life
60
I'd Give My Life
60

The Reckoning
Ellis, the Detective
40

International Crime
Commisioner Weston
54

Below the Deadline
Pearson
44

A Man Betrayed
Detective Ryan
60

The Preview Murder Mystery
Detective McKane
56

For the Defense
Daly
48

A Fever in the Blood
Peters
60

Dangerous Holiday
Marty
10

Unashamed
Captain Riorden
63

Little Miss Nobody
Dutch Miller
60

24 Hours
Police Commissioner
55

The Fall Guy
'Nifty' Herman
55

Good News
Coach
50

Strange Justice
Smith
45

The Lady in the Morgue
Police Lieutenant Strom
62

Call of the Wild
'Tex' Rickard
62

Law of the Tropics
Det. Maguire
60

The Strange Love of Molly Louvain
Police Sergeant
59

Myrt and Marge
Jackson the Angel
37

I Stand Accused
Detective Gilroy
0

Blazing Across the Pecos
Matt Carter
40

It Had to Happen
Mayor's Secretary
55

Wanted: Jane Turner
Lansing - Postal Chief (uncredited)
53

Tell No Tales
Eddie (uncredited)
46

The Personality Kid
Rankin
37

Strictly Personal
Flynn
50

Fugitive in the Sky
Dave Brandon
60

Doctor X
Daily World Editor
60

George White's Scandals
Al Burke (as Tom Jackson)
50

Stronger Than Desire
Tom Thompson - Flagg's Investigator (uncredited)
51

Nancy Drew... Reporter
City Editor Bostwick
60

It Conquered the World
George Haskell
47

Another Thin Man
Detective (uncredited)
71

Beau Geste
Colonel in Recruiting Office (uncredited)
69

Gypsy
Station Master (uncredited)
63

The Escape
Police Lieutenant
55

Phone Call from a Stranger
62

Big Town Scandal
Police Chief (uncredited)
50

You, the People
Vote Counter
58

A Son Comes Home
District Attorney
10

Crime Wave
Bank Guard (uncredited)
70

The Last Hurrah
Man (uncredited)
71

Hollywood Boulevard
Detective
27

Scarlet Street
Chief of Detectives (uncredited)
75

The Thin Man
Reporter (uncredited)
74

Why Girls Leave Home
Police Captain Reilly
50

Double Cross Roads
Deuce Wilson
0

Just Before Dawn
Walter Cummings (uncredited)
63

A Big Hand for the Little Lady
Rt. Rev. Mr. Monckton (uncredited)
71

The Irish in Us
Doc Mullins (as Thomas Jackson)
76

City for Conquest
Pep - Sportswriter (uncredited)
68

Castle on the Hudson
Seated Reporter on Train (uncredited)
68

Lady with Red Hair
Mr. Frank Harper (uncredited)
65

Millionaires in Prison
Warden Tom Hammond
60

Behind the Mask
Agent Burke
56

Women Without Names
Detective Sergeant Reardon
41

Carnival
Mac
0

The Case of the Curious Bride
Toots Howardv
59

La Conga Nights
Agent
75

Afraid to Talk
Deputy Benchley
60

Free, Blonde and 21
Inspector Saunders
80

The Devil's Mask
Det. Capt. Quinn
57

How DOooo You Do
Detective
0

The Devil Plays
Captain Brown
41

Melody in Spring
House Detective
60

The Westland Case
Detective Lt. Strom
60

Escapade
Bennie
0

A Fugitive from Justice
Corkery
35

The Accusing Finger
Lead Investigator Logan
47

The Crime Doctor’s Strangest Case
Detective Yarnell
48

No Place for a Lady
Captain Baker, district attorney
60

Blonde Alibi
Lawyer Allen (Uncredited)
39

The Jury's Secret
Jackson, Editor
40

Let Them Live
Foster
0

She Couldn't Take It
Spieler at Car Exhibition
45

The Doorway to Hell
Undetermined Secondary Role (uncredited)
63

Special Agent
State Police Commander's Assistant (uncredited)
62

Girl from God's Country
Poker Player
0

Reform School Girl
Judge of the Juvenile Court (Uncredited)
46

Meet Me at the Fair
Billy Gray
70

The Lawless Woman
'Paddy' Reardon
0

Union Station
Detective (uncredited)
64

Crime Takes a Holiday
Brennan
0

The Guilt of Janet Ames
(uncredited)
57

The Avenger
McCall
60

The Fuller Brush Man
Policeman in Park (uncredited)
60

Women Go on Forever
Detective
0

Advice to the Lovelorn
70

Critic's Choice
Joe, the Stage Doorman (uncredited)
55