Episode name:

Morty's Mind Blowers

Season: 3

Episode: 8

Air date: September 17, 2017

Characters:

Rick Sanchez, 

Morty Smith, 

Summer Smith, 

Beth Smith, 

Jerry Smith, 

Beebo, 

Collector, 

Gobo, 

Gordon Lunas, 

Jessica, 

Mr. Meeseeks, 

Mr. Poopybutthole, 

Nancy, 

Principal Vagina, 

Snuffles (Snowball), 

Truth Tortoise, 

Voltematron, 

Zick Zack, 

Chang, 

Dr. Eleanor Arroway,