'The Only Light in the Darkness' is the nineteenth episode of the first season of Agents of S.H.I.E.L.D.
With their world turned upside down, Coulson races to save the life of his one true love as the mystery of "The Cellist" which began in Marvel's The Avengers, is finally revealed.
- Clark Gregg - Phil Coulson
- Ming-Na Wen - Melinda May
- Elizabeth Henstridge - Jemma Simmons
- Iain De Caestecker - Leo Fitz
- Brett Dalton - Grant Ward
- Chloe Bennett - Skye
- B.J. Britt - Antoine Triplett
- Patton Oswalt - Eric Koenig
- Patrick Brennan - Marcus Daniels
- Bill Paxton - John Garrett
- Amy Acker - Audrey Nathan