Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Episode # | Season # | Title | Directed by | Written by | Original airdate | Production code # |
| --- | --- | --- | --- | --- | --- | --- |
| 50.0 | 301.0 | "Ghost Town U.S.A." | Oscar Rudolph | Howard Leeds | September17,1971 | 49.0 |
| 51.0 | 302.0 | "Grand Canyon or Bust" | Oscar Rudolph | Tam Spiva | September24,1971 | 50.0 |
| 52.0 | 303.0 | "The Brady Braves" | Oscar Rudolph | Tam Spiva | October1,1971 | 51.0 |
| 53.0 | 304.0 | "The Wheeler-Dealer" | Jack Arnold | Bill Freedman & Ben Gershman | October8,1971 | 53.0 |
| 54.0 | 305.0 | "My Sister, Benedict Arnold" | Hal Cooper | Elroy Schwartz | October15,1971 | 58.0 |
| 55.0 | 306.0 | "The Personality Kid" | Oscar Rudolph | Ben Starr | October22,1971 | 54.0 |
| 56.0 | 307.0 | "Juliet is the Sun" | Jack Arnold | Brad Radnitz | October29,1971 | 52.0 |
| 57.0 | 308.0 | "And Now a Word From Our Sponsor" | Peter Baldwin | Albert E. Lewin | November5,1971 | 59.0 |
| 58.0 | 309.0 | "The Private Ear" | Hal Cooper | Michael Morris | November12,1971 | 58.0 |
| 61.0 | 312.0 | "Getting Davy Jones" | Oscar Rudolph | Phil Leslie & Al Schwartz | December10,1971 | 63.0 |
| 62.0 | 313.0 | "The Not-So-Rose-Colored Glasses" | Leslie H. Martinson | Bruce Howard | December24,1971 | 61.0 |
| 63.0 | 314.0 | "The Teeter-Totter Caper" | Russ Mayberry | Joel Kane & Jack Lloyd | December31,1971 | 56.0 |
| 64.0 | 315.0 | "Big Little Man" | Robert Reed | Skip Webster | January7,1972 | 62.0 |
| 65.0 | 316.0 | "Dough Re Mi" | Allen Baron | Ben Starr | January14,1972 | 64.0 |
| 66.0 | 317.0 | "Jan's Aunt Jenny" | Hal Cooper | Michael Morris | January21,1972 | 66.0 |
| 67.0 | 318.0 | "The Big Bet" | Earl Bellamy | Elroy Schwartz | January28,1972 | 65.0 |
| 68.0 | 319.0 | "The Power of the Press" | Jack Arnold | Ben Gershman & Bill Freedman | February4,1972 | 68.0 |
| 69.0 | 320.0 | "Sergeant Emma" | Jack Arnold | Harry Winkler | February11,1972 | 69.0 |
| 70.0 | 321.0 | "Cindy Brady, Lady" | Hal Cooper | Al Schwartz & Larry Rhine | February18,1972 | 67.0 |
| 71.0 | 322.0 | "My Fair Opponent" | Peter Baldwin | Bernie Kahn | March3,1972 | 71.0 |
Question:
List all directors when Brad Radnitz was the writer?
Answer:
Jack Arnold