4C

Any thoughts on Harriet Gray withholding the pills from her husband? Was it a good plan?

that was pretty cold - especially since she put them in danger to get them. But, with her fast thinking, her husband acting out may be the distraction that they need to either get away or to make them memorable to witnesses

I thought it was odd at first but then thought of how he reacts without them and thought this might just be to create a distraction. On the other hand it could get him killed and they would still have one bargaining chip.

I thought it could give them a chance to distract but it could get him killed.

I agree. I think she's hoping people will remember them, possibly even the van they got in, and that will help them in the long run.

Harriet is an intelligent woman; I think she's weighed up the pros and cons and believes this is her best bet to help Sigma track them down.
It's certainly the best way of leaving a trail - anything physical would be spotted by Anni. I'm surprised that Anni has not cottoned on, though.