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| Season | Episodes | ||
|---|---|---|---|
| 1 | 1954-1955 | [1954] | 26 |
| 2 | 1955-1956 | [1955] | 39 |
| 3 | 1956-1957 | [1956] | 38 |
| 4 | 1957-1958 | [1957] | 40 |
| 5 | 1958-1959 | [1958] | 39 |
| 6 | 1959-1960 | [1959] | 37 |
| 7 | 1960-1961 | [1960] | 36 |
| 8 | 1961-1962 | [1961] | 36 |
| 9 | 1962-1963 | [1962] | 32 |
| 10 | 1963-1964 | [1963] | 29 |
| 11 | 1964-1965 | [1964] | 33 |
| 12 | 1965-1966 | [1965] | 32 |
| 13 | 1966-1967 | [1966] | 30 |
| 14 | 1967-1968 | [1967] | 28 |
| 15 | 1968-1969 | [1968] | 28 |
| 16 | 1969-1970 | [1969] | 22 |
| 17 | 1970-1971 | [1970] | 22 |
| 18 | 1971-1972 | [1971] | 20 |
| 19 | 1972-1973 | [1972] | 24 |
36 Episodes:
Direction
Hollingsworth Morse: [13 Episodes]
William Beaudine: [12 Episodes]Gerald Schnitzer: [4 Episodes]
Oliver Drake: [2 Episodes]
Jack Hively: [2 Episodes]
Jeffrey Hayden: [1 Episodes]
Dick Darley: [1 Episodes]
Austen Jewell: [1 Episodes]
Interpreters
Jon Provost (Timmy Martin)[36 Episodes] 
June Lockhart (Ruth Martin)[36 Episodes] 
Lassie [34 Episodes] 
Hugh Reilly (Paul Martin)[22 Episodes] 
Robert Foulk [6 Episodes] 
Andy Clyde (Cully Wilson)[5 Episodes] Florence Lake [2 Episodes]
Russ Bender [2 Episodes] Rich Correll [2 Episodes]
Byron Foulger [2 Episodes] 
Carla Balenda [2 Episodes] Tom Nolan [2 Episodes]
Phil Chambers [2 Episodes] 
Paul Langton [1 Episodes] Linda Wrather [1 Episodes]
Charles Herbert [1 Episodes]
Charles Tannen [1 Episodes] 
Gil Perkins [1 Episodes] 
Jackie Searl [1 Episodes] Chris Warfield [1 Episodes]
Billy e. Hughes [1 Episodes]
Hal Baylor [1 Episodes] 
Boyd Morgan [1 Episodes] 
John Archer (attore) [1 Episodes] 
John Mitchum [1 Episodes] Barbara Knudson [1 Episodes]
Raymond Bailey [1 Episodes] 
Peg Stewart [1 Episodes] 
Eddy Waller [1 Episodes] 
Kenneth Tobey [1 Episodes] 
Byron Morrow [1 Episodes] 
Harry Lauter [1 Episodes] Bobby Folkerson [1 Episodes]
James Burke [1 Episodes] 
Marie Windsor [1 Episodes] Robert Brubaker [1 Episodes]
James Lydon [1 Episodes] Lea Enslin [1 Episodes]
Chick Chandler [1 Episodes] 
Henry Wills [1 Episodes] Renato Savino [1 Episodes]
Pal [1 Episodes] 
Ray Montgomery [1 Episodes] 
Walter Reed [1 Episodes] Mary Lawrence [1 Episodes]
Lloyd Nelson [1 Episodes]
William Henry [1 Episodes] 
Lee Roberts [1 Episodes] Jennie Lynn [1 Episodes]
Nolan Leary [1 Episodes] Jason Johnson [1 Episodes]
Michael Mcgreevey [1 Episodes] 
James Flavin [1 Episodes] 
Leonard P. Geer [1 Episodes] 
Roy Barcroft [1 Episodes] 
Highland Dale [1 Episodes] 
Marshall Reed [1 Episodes] 
L.Q. Jones [1 Episodes] 
John Cliff [1 Episodes] Cynthia Lane [1 Episodes]
Harry Carey jr. [1 Episodes] 
Ellen Corby [1 Episodes] Flip Mark [1 Episodes]
Talbot Stephen [1 Episodes] 
Woody Chambliss [1 Episodes] 
J. Pat o'malley [1 Episodes] Forrest Taylor [1 Episodes]
Patty ann Gerrity [1 Episodes]
Roy Engel [1 Episodes] 
James Griffith [1 Episodes] 
Dan Sheridan [1 Episodes] Gil Rogers [1 Episodes]
Eugene Mazzola [1 Episodes]