A man comes in after a drug-fueled episode, biting people and behaving like a zombie, which rattles the staff.

Titled " Take Me to Your Leader ," it serves as the premiere for the "Death Valley" (alien-themed) half of the Double Feature season.

and Cristina Yang's friendship continues to fray as they clash over their career paths and parenting.

Titled " Open Your Eyes ," this episode features a dark twist where the character Siddiq realizes Dante is a spy for the Whisperers before a fatal confrontation.

and Alex Karev struggle with communication, while Alex's father issues loom in the background.

A rare case involving adult conjoined twins who have differing views on being separated. Personal Dramas:

surprises Miranda Bailey by quitting his surgical residency in Los Angeles to return home, but the reception is colder than he expected. Other Possible "S10E7" References

The doctors at Grey Sloan Memorial Hospital deal with a variety of unusual patients during a hectic Halloween shift: