[BAA Comets] Will C/2013 A1 (Siding Spring) hit Mars in October?

[Jeremy Shears]

Er, no! But it might deposit ~100 kg dust on its surface: 
A Study of Dust and Gas at Mars from Comet C/2013 A1 (Siding Spring): http://arxiv.org/abs/1408.2792
Go well!Jeremy