The Journey to the Heaviside Layer

The Journey (or Ascent) to the Heaviside Layer is the start of the conclusion of Cats, as the plot resolves with Grizabella having been chosen as the Cat to start a new life.

Context
After Grizabella finishes singing Memory, the tribe understand and empathise with her. Victoria touches Grizabella's hand, signalling that she is accepted back into the tribe. As all the others greet Grizabella, the music builds and leads to the lyrics "Up Up Up past the Russell Hotel, Up Up Up Up to the Heaviside Layer." Old Deuteronomy takes Grizabella by the hand and, as the other Jellicles follow behind them, leads her onto the tire, which rises up. Grizabella enters the Heaviside Layer, and Old Deuteronomy returns to the company to sing The Addressing of Cats.

Grizabella ascends in a variety of ways, depending on the set limitations. She either walks up a staircase, or is carried off in a "flying saucer", or she simply flies up on wires.

Lyrics
Up Up Up past the Russell Hotel, Up Up Up Up to the Heaviside Layer. Up Up Up past the Russell Hotel, Up Up Up Up to the Heaviside Layer.

Up Up Up past the Jellicle Moon, Up Up Up Up to the Heaviside Layer. Up Up Up past the Jellicle Moon, Up Up Up Up to the Heaviside Layer.

The mystical divinity of unashamed felinity, Round the Cathedral Rang, "Vivat!" Life to the everlasting cat!