| Medical Story | 1975 | Dr. Taussig | TV Show |
| Force Five | 1975 | Cal Newkirk | TV Movie |
| The Rockford Files | 1974 | Carl Colton 'C.C.' Calloway | TV Show |
| The Six Million Dollar Man: The Solid Gold Kidnapping | 1973 | William Henry Cameron | TV Movie |
| Harry O | 1973 | Admiral Tannehill | TV Show |
| The Evil Touch | 1973 | Reverend Vincent | TV Show |
| The Magician | 1973 | Nicholas Olson | TV Show |
| Man and Boy | 1972 | Mossman | Movie |
| The Rookies | 1972 | Ben Fuller | TV Show |
| The Sixth Sense | 1972 | Dr. Philip Ford | TV Show |
| The Streets of San Francisco | 1972 | Fr. Henry Driscoll | TV Show |
| The Daughters of Joshua Cabe | 1972 | Amos Wetherall | TV Movie |
| The Family Rico | 1972 | Mike Lamont | TV Movie |
| The New Healers | 1972 | Dr. Victor Briggs | TV Movie |
| Terror in the Sky | 1971 | Marty Treleavan | TV Movie |
| Cannon | 1971 | Kowalski | TV Show |
| Longstreet | 1971 | Harold Kemp | TV Show |
| Owen Marshall: Counselor at Law | 1971 | Matt | TV Show |
| The Deadly Dream | 1971 | Dr. Harold Malcolm | TV Movie |
| Paris 7000 | 1970 | Lawrence Lockner | TV Show |
| Marcus Welby, M.D. | 1969 | Dr. Justin Garvey | TV Show |
| Medical Center | 1969 | Ben | TV Show |
| Night Gallery | 1969 | Charlie Wheatland / Director (segment "The Academy") | TV Show |
| Mod Squad | 1968 | Lt. Jerry Price | TV Show |
| The Name of the Game | 1968 | King | TV Show |
| Ironside | 1967 | Preston Lakes | TV Show |
| Mannix | 1967 | B. J. Yarborough | TV Show |
| The High Chaparral | 1967 | Big John Cannon | TV Show |
| I Saw What You Did | 1965 | Dave Mannering | Movie |
| Mirage | 1965 | Major Crawford | Movie |
| A Man Called Shenandoah | 1965 | Sheriff Dan Grier | TV Show |
| Branded | 1965 | Roy Beckwith | TV Show |
| Roustabout | 1964 | Joe Lean | Movie |
| Strait-Jacket | 1964 | Bill Cutler | Movie |
| The Carpetbaggers | 1964 | Jonas Cord Sr. | Movie |
| Daniel Boone | 1964 | Bill Sedley / Aaron Burr | TV Show |
| A Gathering of Eagles | 1963 | Gen. Hewitt | Movie |
| Burke's Law | 1963 | Jason Hayes | TV Show |
| Arrest and Trial | 1963 | Henry Vallos | TV Show |
| Bob Hope Presents the Chrysler Theatre | 1963 | Ben Stafford / St. Cloud | TV Show |
| Grindl | 1963 | Karl Stauffer | TV Show |
| Kraft Suspense Theatre | 1963 | General | TV Show |
| The Great Adventure | 1963 | President Grover Cleveland / Abel Parrish | TV Show |
| The Travels of Jaimie McPheeters | 1963 | Sugar Bob Devlin | TV Show |
| The Alfred Hitchcock Hour | 1962 | Paul White / Doctor Hellyer | TV Show |
| The Virginian | 1962 | Bill King / Charlie Ryan / Peterson | TV Show |
| Shootout at Big Sag | 1962 | Sam Barbee | Movie |
| The New Loretta Young Show | 1962 | Bascomb T. Beebe | TV Show |
| Alcoa Premiere | 1961 | Mr. Green | TV Show |
| Hazel | 1961 | Zachary King | TV Show |
| The New Breed | 1961 | Dr. Eric Thor | TV Show |
| Insight | 1960 | Governor | TV Show |
| Bonanza | 1959 | Tom Caine / Josh Tatum | TV Show |
| Rawhide | 1959 | Frank Travis / Jeremiah Walsh | TV Show |
| The DuPont Show with June Allyson | 1959 | Andrew Middleton | TV Show |
| Hotel de Paree | 1959 | O.K. Lassiter | TV Show |
| Once Upon a Horse... | 1958 | Granville 'Granny' Dix | Movie |
| Twilight for the Gods | 1958 | Harry Hutton | Movie |
| The Rifleman | 1958 | Jim Lewis | TV Show |
| Colgate Theatre | 1958 | Paul Harper | TV Show |
| Istanbul | 1957 | Charlie Boyle | Movie |
| Kiss Them for Me | 1957 | Eddie Turnbill | Movie |
| The Vintage | 1957 | Louis Morel | Movie |
| Wagon Train | 1957 | Eli Bancroft | TV Show |
| Star in the Dust | 1956 | George Ballard | Movie |
| Tea and Sympathy | 1956 | Bill Reynolds | Movie |
| The Fastest Gun Alive | 1956 | Lou Glover | Movie |
| Playhouse 90 | 1956 | William Dean Howells / James Mayberry / Paul Henderson / ... | TV Show |
| Zane Grey Theater | 1956 | Cash Wilson / Jim Lewis | TV Show |
| Alfred Hitchcock Presents | 1955 | Wayne Phillips | TV Show |
| Gunsmoke | 1955 | Virgil Powell | TV Show |
| Matinee Theatre | 1955 | | TV Show |
| The Millionaire | 1955 | Norman Conover / Brian Hendricks | TV Show |
| On the Waterfront | 1954 | Glover | Movie |
| Climax! | 1954 | Richard Moore / Doug Randell / Richard Carmichael / ... | TV Show |
| Inner Sanctum | 1954 | Seton | TV Show |
| Captain Scarface | 1953 | Sam (as Lief Erickson) | Movie |
| Invaders from Mars | 1953 | Mr. George MacLean | Movie |
| Never Wave at a WAC | 1953 | Sgt. Norbert 'Noisy' Jackson | Movie |
| Trouble Along the Way | 1953 | Father Provincial | Movie |
| G.E. True Theater | 1953 | Man | TV Show |
| A Perilous Journey | 1953 | Richards | Movie |
| Born to the Saddle | 1953 | Bob Marshall | Movie |
| Fort Algiers | 1953 | Kalmani | Movie |
| Paris Model | 1953 | Edgar Blevins | Movie |
| Abbott and Costello Meet Captain Kidd | 1952 | Morgan | Movie |
| Carbine Williams | 1952 | Feder | Movie |
| Sailor Beware | 1952 | Cmdr. Lane | Movie |
| The Cimarron Kid | 1952 | Marshal John Sutton | Movie |
| With a Song in My Heart | 1952 | General (uncredited) | Movie |
| My Wife's Best Friend | 1952 | Nicholas Reed | Movie |
| The Unexpected | 1952 | | TV Show |
| Fourteen Hours | 1951 | Bit Part (uncredited) | Movie |
| Show Boat | 1951 | Pete (as Lief Erickson) | Movie |
| The Tall Target | 1951 | Stranger | Movie |
| Schlitz Playhouse | 1951 | Sam Sargent / Dan | TV Show |
| Reunion in Reno | 1951 | B. Frederick Linaker | Movie |
| Personal Appearance Theater | 1951 | | TV Show |
| Dallas | 1950 | U.S. Marshal Martin Weatherby | Movie |
| Stella | 1950 | Fred Anderson Jr. | Movie |
| Three Secrets | 1950 | Bill Chase | Movie |
| Lux Video Theatre | 1950 | Jim Torrance | TV Show |
| Love That Brute | 1950 | Elmdale Military Academy Captain (uncredited) | Movie |
| Mother Didn't Tell Me | 1950 | Dr. Bruce Gordon | Movie |
| The Showdown | 1950 | 'Big' Mart Stores | Movie |
| Johnny Stool Pigeon | 1949 | Pringle | Movie |
| The Lady Gambles | 1949 | Tony | Movie |
| Your Show Time | 1949 | Jean Valjean | TV Show |
| Family Theatre | 1949 | Pilate | TV Show |
| Joan of Arc | 1948 | Dunois - Bastard of Orleans | Movie |
| Miss Tatlock's Millions | 1948 | Dr. Mason | Movie |
| Sorry, Wrong Number | 1948 | Fred Lord | Movie |
| The Snake Pit | 1948 | Gordon | Movie |
| The Gay Intruders | 1948 | Dr. Harold Matson | Movie |
| The Gangster | 1947 | Beaumont | Movie |
| Blonde Savage | 1947 | Steve Blake | Movie |
| Arabian Nights | 1942 | Kamar (as Leif Erikson) | Movie |
| Eagle Squadron | 1942 | Johnny M. Coe | Movie |
| Night Monster | 1942 | Laurie (as Leif Erikson) | Movie |
| Pardon My Sarong | 1942 | Whaba (as Leif Erikson) | Movie |
| The Fleet's In | 1942 | Jake | Movie |
| Are Husbands Necessary? | 1942 | Bill Stone | Movie |
| H.M. Pulham, Esq. | 1941 | Rodney 'Bo-Jo' Brown (as Leif Erikson) | Movie |
| Nothing But the Truth | 1941 | Van | Movie |
| The Blonde from Singapore | 1941 | Terry Prescott | Movie |
| ...One Third of a Nation... | 1939 | Peter Cortlant (as Leif Erikson) | Movie |
| The Big Broadcast of 1938 | 1938 | Bob Hayes (as Leif Erikson) | Movie |
| Ride a Crooked Mile | 1938 | Johnny Simpkins | Movie |
| Conquest | 1937 | Paul Lachinski (as Leif Erikson) | Movie |
| Waikiki Wedding | 1937 | Dr. Victor Quimby (as Leif Erikson) | Movie |
| Thrill of a Lifetime | 1937 | Howard 'Howdy' Nelson | Movie |
| College Holiday | 1936 | Dick Winters | Movie |
| Desert Gold | 1936 | Glenn Kasedon (as Glenn Erikson) | Movie |
| Drift Fence | 1936 | Curley Prentiss (as Glenn Erikson) | Movie |
| Girl of the Ozarks | 1936 | Tom Bolton (as Leif Erikson) | Movie |
| Nevada | 1935 | Bill Ide (as Glen Erickson) | Movie |
| Wanderer of the Wasteland | 1935 | Lawrence (as Glenn Erickson) | Movie |
| The Sweetheart of Sigma Chi | 1933 | Band Singer with Ted Fio Rito | Movie |
| Air Tonic | 1933 | Glenn Erickson - Band Singer (as Glenn Erickson) | Short Film |
