CBS | 8:00 pm

Mac and Riley (Lucas Till, Tristin Mays) travel overseas together on a mission to prevent the collapse of a fragile government in the new episode "C8H7ClO + Nano-Trackers + Resistance + Maldives + Mind Games." During their operation, however, the pair inadvertently inhale some deadly microscopic technology. Meredith Eaton and Henry Ian Cusick also star; the guest cast features Deepti Gupta, Scott Holroyd and Alexandra Grey.