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 | Broadcast date | Run time | Viewers (in millions) | Archive |
| --- | --- | --- | --- | --- |
| " Episode 1 " | 8April1967 | 23:47 | 8.0 | 16mm t/r |
| " Episode 2 " | 15April1967 | 25:22 | 6.4 | Only stills and/or fragments exist |
| " Episode 3 " | 22April1967 | 23:10 | 7.9 | 16mm t/r |
| " Episode 4 " | 29April1967 | 24:28 | 6.9 | Only stills and/or fragments exist |
| " Episode 5 " | 6May1967 | 23:34 | 7.1 | Only stills and/or fragments exist |
| " Episode 6 " | 13May1967 | 23:38 | 8.0 | Only stills and/or fragments exist |
Question:
What is the run time for the episode with 7.9 million viewers?
Answer:
23:10