In the chaos of the Noxious Gas Sequence, Dr. Tanaka will attempt to flee Apollo and run to one of the following locations. The Helipad, Alpha Company's Dropship, or Easy Company's Troop Transport. The Marines, still disoriented from the effects of the Gas, must split up and hunt him down. It is up to the players themselves to decide who will go where, and where they will regroup. Pausing to plan out a plan of attack is probably the best solution.
It is important to note that the Doctor must be found before a Timer counts down, or he will escape and Alpha Company will fail the campaign. Once Dr. Tanaka has been captured, the team should regroup immediately for the battle with Cerberus.