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 # | Prod # | Title | Directed by | Written by | Originalairdate | Filmed |
| --- | --- | --- | --- | --- | --- | --- |
| 1.0 | 106.0 | "State Visit" | John Moxey | Jim O'Connolly | 18 March 1965 | Aug/Sept 1964 |
| 2.0 | 102.0 | "The 'V' Men" | Cyril Frankel | Alan Falconer | 25 March 1965 | July 1964 |
| 3.0 | 107.0 | "The Firebug" | Roy Ward Baker | David Chantler | 1 April 1965 | Sept 1964 |
| 4.0 | 109.0 | "The Big Fix" | James Hill | Jack Whittingham | 8 April 1965 | Sept. 1964 |
| 5.0 | 112.0 | "The Housekeeper" | Leslie Norman | David Chantler | 15 April 1965 | Oct. 1964 |
| 6.0 | 108.0 | "The Ladykiller" | Leslie Norman | David Chantler | 22 April 1965 | Sept. 1964 |
| 7.0 | 103.0 | "To Catch a Tiger" | Leslie Norman | Iain MacCormck | 29 April 1965 | July 1964 |
| 8.0 | 111.0 | "Big Fish, Little Fish" | Cyril Frankel | Alan Falconer | 6 May 1965 | Oct. 1964 |
| 9.0 | 105.0 | "The White Rat" | Roy Ward Baker | Harry W. Junkin | 13 May 1965 | Aug. 1964 |
| 10.0 | 115.0 | "How to Retire without Really Working" | George Pollock | Norman Hudis | 20 May 1965 | Nov-Dec. 1964 |
| 11.0 | 117.0 | "Subway to Revenge" | Roy Ward Baker | Norman Hudis | 27 May 1965 | Jan, 1965 |
| 12.0 | 122.0 | "The Great Plane Robbery" | Leslie Norman | Alan Falconer | 3 June 1965 | Mar-Apr 1965 |
| 13.0 | 118.0 | "Gang War" | Quentin Lawrence | David Chantler | 10 June 1965 | Jan-Feb. 1965 |
| 14.0 | 101.0 | "The Tin God" | John Gilling | Harry W.Junkin | 17 June 1965 | Jun-Jul. 1964 |
| 15.0 | 119.0 | "The Alibi Men" | Cyril Frankel | Iain MacCormick | 24 June 1965 | Feb. 1965 |
| 16.0 | 116.0 | "The Wall" | Leslie Norman | David Chantler | 16 September 1965 | Jan. 1965 |
| 17.0 | 121.0 | "The Thin Red Line" | Cyril Frankel | Iain MacCormick | 3 February 1966 | March 1965 |
| 18.0 | 126.0 | "A Perfect Crime" | Leslie Norman | Alan Falconer | 10 February 1966 | May 1965 |
| 19.0 | 124.0 | "The Millionaire's Daughter" | Cyril Frankel | Norman Hudis | 17 February 1966 | April 1965 |
| 20.0 | 110.0 | "Morna" | Cyril Frankel | Alan Falconer | 24 February 1966 | Oct. 1964 |
| 21.0 | 125.0 | "Boy With Gun" | Jeremy Summers | Iain MacCormick | 3 March 1966 | May 1965 |
| 22.0 | 114.0 | "Fall High, Fall Hard" | Leslie Norman | Malcolm Hulke | 15 April 1966 | Nov 1964 |
| 23.0 | 120.0 | "The Prowler" | Robert Tronson | Harry W.Junkin | 22 April 1966 | March 1965 |
| 24.0 | 123.0 | "The Reluctant Witness" | Jeremy Summers | Norman Hudis | 26 April 1966 | April 1965 |
| 25.0 | 104.0 | "The Rhyme and the Reason" | John Gilling | Jack Whittingham | 3 May 1966 | Aug. 1964 |
Question:
How many episodes have the title "a perfect crime"?
Answer:
1.0