In the thrilling conclusion to Big Rob Reinter (a whole winter month's worth of Rob Reiner films), the gang takes on 1984's This Is Spinal Tap! Ben, Gabi, and Mimi turn the dial up to 11 to discuss the seminal mockumentary. Directed and co-written by Rob Reiner, starring and co-written by Christopher Guest, Michael McKean, and Harry Shearer.