Tomas's recklessness and Caleb's lie are suggestive of the ways that the demons infiltrate in their mentalities. In Tomas's case, he is viewing himself as the Messiah who has the power to heal the possessed ones by dealing with the demons, face to face. However, his impetuous confidence in his power will likely lead him to underestimate the evil spirits and thus expose himself to their darkness. An indication that this scenario will probably happen is the vision where he is in the confessional and the demon is whispering to him "He is afraid of you, Tomas. He is afraid of what you can do." Therefore, the demon, by strengthening his ego and planting the seeds of jealousy and vanity, intends to disrupt Toma's relationship with Marcus. The other traces that the demon left behind on last Friday's episode was Caleb's lie which made Andy lose Verity's trust. Andy is confused regarding what is happening to the children and feels like something is terribly wrong. Caleb's lie is the first obvious proof that the spirit is taking over his consciousness since Caleb wouldn't deceive Andy to hurt Verity and create havoc in their house.
Clearly, the residents of the foster house will need to gather their mental strength to battle with what lies ahead. Father Tomas and Marcus relationship will be challenged and their faith in each other will be tested possibly to the point of separation. Hopefully, Tomas will realize that his power can be seen as a gift and a weakness considering it can be easily exploited by the demons. The third episode could be the link between our priests and the foster house