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 | UK viewers (million) | Share (%) | Original air date |
| --- | --- | --- | --- | --- | --- | --- |
| 1.0 | "Episode 1" | Bharat Nalluri | Ben Richards | 4.50 | 17.9 | 7February2011 |
| 2.0 | "Episode 2" | Bharat Nalluri | Ben Richards | 3.30 | 13.0 | 8February2011 |
| 3.0 | "Episode 3" | Omar Madha | Ben Richards and Simon Block | 2.95 | 11.8 | 14February2011 |
| 4.0 | "Episode 4" | Omar Madha | Jack Lothian | 2.63 | 10.05 | 15February2011 |
| 5.0 | "Episode 5" | Andy Goddard | Ben Richards and Jimmy Gardner | 2.70 | 10.8 | 21February2011 |
| 6.0 | "Episode 6" | Andy Goddard | David Farr | 1.52 | 10.5 | 27February2011 |
| 7.0 | "Episode 7" | Jamie Payne | David Farr | 1.33 | 9.7 | 6March2011 |
Question:
How many episodes have the title "episode 2"?
Answer:
2.0