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 | Viewing Figures (millions) Sourced by BARB ; includes ITV1 HD and ITV1 +1 |
| --- | --- | --- | --- | --- | --- |
| 1.0 | "Case One (Part 1)" | John Strickland | Ben Court & Caroline Ip | 30 January 2012 | 7.35 |
| 2.0 | "Case One (Part 2)" | John Strickland | Ben Court & Caroline Ip | 6 February 2012 | 6.88 |
| 3.0 | "Case Two (Part 1)" | Richard Clark | Ben Court & Caroline Ip | 13 February 2012 | 7.12 |
| 4.0 | "Case Two (Part 2)" | Richard Clark | Ben Court & Caroline Ip | 20 February 2012 | 6.95 |
| 5.0 | "Case Three (Part 1)" | Jon East | Ben Court & Caroline Ip | 27 February 2012 | 6.78 |
Question:
What is the original air date for the episode viewed by 7.12 million?
Answer:
13 February 2012