Travis Marshall is on the brink of falling into the dark again in the upcoming episode of "Dexter". Seemingly not really over with his protege, Gellar will come back looking for Travis to ask his assistance to put his plan into action although Travis clearly tells him to go away.
Learning that Travis' dark passenger can be killed, Dexter meets him to find out where Gellar is, but Travis warns him that the professor is very dangerous. Meanwhile, lessons learned from Brother Sam prove instrumental in Dexter's case.
"Sins of Omission" will additionally see Debra and Capt. LaGuerta banging heads over an investigation into the death of a call girl. Also looking for Travis, Debra is so close to him but she fails to notice him.
"Dexter" airs every Sunday at 9/8c on Showtime.