Carrie has realised she needs Allison's help after her discoveries in Amsterdam, but has she worked out Allison's behind it all?
In a series of flashbacks, we're going to find out 'All About Allison' as we delve into the reasons behind her treachery – finally we'll get to know about her past and why she's working with the enemy.
Also, Quinn's plans face a major change as he travels to Syria. Can he get out of this predicament alive, or is this a step too far?
Homeland, Channel 4, 9pm
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