The number of weeks to run Alpha will depend on how many videos you show on the Alpha Weekend. If you show 4 videos on your Alpha weekend, here is an average for each series:

Using the Alpha Film Series - 11 weeks
Using Alpha Youth Series - 9 weeks
Using Alpha with Nicky Gumbel series - 11 weeks

If you show only 3 videos on your Alpha weekend, you'll need to add an extra week to your Alpha (either before or after your weekend).

More info:
What topics does Alpha cover?
Where can I preview each of these series?
Big Picture Overview of Alpha (4-min video)

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