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:
| Date | Time | Channel | Running Time | Notes |
| --- | --- | --- | --- | --- |
| 19 March 2008 | 21:00 | BBC Four | 66 min 44 sec | Original release |
| 20 March 2008 | 00:05 | BBC Four | 66 min 44 sec | Repeat |
| 21 March 2008 | 22:00 | BBC Four | 66 min 44 sec | Repeat |
| 23 March 2008 | 22:45 | BBC Four | 66 min 44 sec | Repeat |
| 28 December 2008 | 22:30 | BBC Four | 66 min 21 sec | Revised repeat |
| 29 December 2008 | 03:40 | BBC Four | 66 min 21 sec | Revised repeat |
| 2 December 2009 | 22:00 | BBC HD | 65 min 35 sec | Re-revised repeat |
Question:
Which channel was on 28 December 2008?
Answer:
BBC Four