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 No. Episode No. refers to the episodes number in the overall series, whereas Series No. refers to the episodes number in this particular series. | Series No. | Episode | Director | Writer(s) | Original airdate |
| --- | --- | --- | --- | --- | --- |
| 16.0 | 1.0 | "A Little Lobbying" | Antonia Bird | Jeremy Brock and Paul Unwin | 12September1987 |
| 17.0 | 2.0 | "A Drop of the Hard Stuff" | Antonia Bird | Roy Mitchell | 19September1987 |
| 18.0 | 3.0 | "Shades of Love" | Michael Brayshaw | Wally K Daly | 26September1987 |
| 19.0 | 4.0 | "Cry for Help" | Alan Wareing | Paul Unwin and Jeremy Brock | 3October1987 |
| 20.0 | 5.0 | "Anaconda" | Michael Brayshaw | Ray Brennan | 10October1987 |
| 21.0 | 6.0 | "Lifelines" | Sharon Miller | Jeremy Brock | 17October1987 |
| 22.0 | 7.0 | "The Raid" | Sharon Miller | Susan Wilkins | 24October1987 |
| 23.0 | 8.0 | "Cross Fingers" | Alan Wareing | David Ashton | 31October1987 |
| 24.0 | 9.0 | "Seeking Heat" | Christopher Menaul | Ray Brennan and Jeremy Brock | 7November1987 |
| 25.0 | 10.0 | "Rock-a-Bye-Baby" | Sharon Miller | Ginnie Hole | 14November1987 |
| 26.0 | 11.0 | "Hooked" | Michael Brayshaw | Billy Hamon | 21November1987 |
| 27.0 | 12.0 | "Fun Night" | Alan Wareing | Al Hunter Ashton | 28November1987 |
| 28.0 | 13.0 | "Peace, Brother" | Michael Brayshaw | David Ashton | 5December1987 |
| 29.0 | 14.0 | "Burning Cases" | Christopher Menaul | Jeremy Brock and Paul Unwin | 12December1987 |
Question:
What series number is the episode "peace, brother"?
Answer:
13.0