After adding Zombies, the Zombie Player chooses 1 Search Card from their hand and places it face down in front of the Human Player who just revealed a Search Card. The Human may not look at this card until the end of their next Turn.
If you place the last card from your hand, then immediately draw 4 more Search Cards into your hand. If the Search Deck is exhausted (all Search Cards have been revealed), then each Human Player will take one more Turn and the game ends (see Game End).
After this, the Human Player to the left of the last Human Player to take a Turn now takes their Turn.