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 | Title | Story | Adapted by | Director | Airdate | Exists? |
| --- | --- | --- | --- | --- | --- | --- |
| 401.0 | “Taste of Evil” | John Wiles | n/a | Michael Ferguson | 21 April 1971 | No |
| 402.0 | “To Lay A Ghost” | Michael J. Bird | n/a | Ken Hannam | 28 April 1971 | Yes |
| 403.0 | “This Body Is Mine” | John Tully | n/a | Eric Hills | 5 May 1971 | Yes |
| 404.0 | “Deathday” | Angus Hall | Brian Hayles | Raymond Menmuir | 12 May 1971 | Yes |
| 405.0 | “The Sons and Daughters of Tomorrow” | Edward Boyd | n/a | Gerald Blake | 19 May 1971 | No |
| 406.0 | “Welcome Home” | Moris Farhi | n/a | Eric Hills | 26 May 1971 | Yes |
| 407.0 | “The Last Witness” | Martin Worth | n/a | Michael Ferguson | 2 June 1971 | No |
| 408.0 | “The Man in My Head” | John Wiles | n/a | Peter Cregeen | 9 June 1971 | Yes |
| 409.0 | “The Chopper” | Nigel Kneale | n/a | Peter Cregeen | 16 June 1971 | No |
| 410.0 | “The Uninvited” | Michael J. Bird | n/a | Eric Hills | 23 June 1971 | No |
| 411.0 | “The Shattered Eye” | David T. Chantler | n/a | Peter Hammond | 30 June 1971 | No |
Question:
What was the title of the episode that martin worth wrote the story for?
Answer:
“The Last Witness”