Lest we forget (Vadic certainly hadn't), Odo was used as an intermediary for ... However, according to the Star Trek: Deep Space Nine Companion, in the first instance it was Doctor Mora Pol ...

Sam Richardson reveals what role his shapeshifter plays in Star Trek: Section 31, which hints his Chameloid may be smarter than Odo (Rene Auberjonois) on Star Trek: Deep Space Nine. Richardson ...