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 | Directed by | Written by | Originalairdate |
| --- | --- | --- | --- | --- |
| 1.0 | " Artists in Crime " | Silvio Narizzano | T.R. Bowen | 23 December 1990 |
| 2.0 | " A Man Lay Dead " | Sarah Pia Anderson | Barbara Machin | 17 April 1993 |
| 3.0 | " The Nursing Home Murder " | Silvio Narizzano | Kevin Laffan | 25 April 1993 |
| 4.0 | " Final Curtain " | Martyn Friend | Barbara Machin Hugh Leonard | 2 May 1993 |
| 5.0 | " Death at the Bar " | Michael Winterbottom | Alfred Shaughnessy | 9 May 1993 |
| 6.0 | " Death in a White Tie " | John Woods | Ken Jones | 16 May 1993 |
| 7.0 | " Hand in Glove " | Martyn Friend | Ken Jones | 10 January 1994 |
| 8.0 | " Dead Water " | John Woods | T.R. Bowen | 1 April 1994 |
| 9.0 | " Scales of Justice " | Jim Goddard | Cyril Williams | 29 August 1994 |
Question:
What is Written By, when Originalairdate is 25 April 1993?
Answer:
Kevin Laffan