Clay Wilcox is the actor who played Billy in the Star Trek: Enterprise second season episode "Carbon Creek".
Wilcox has appeared in such television series as China Beach (starring Star Trek: Voyager's Robert Picardo), NYPD Blue (with Gordon Clapp and Michael Buchman Silver), The Practice (with Paul Dooley, Alan Oppenheimer, and Richard McGonagle), Deadwood (starring Timothy Olyphant, Brad Dourif, Jim Beaver, Paula Malcomson, Keith Carradine, Leon Rippy, Zach Grenier, Keone Young, and Glenn Morshower), The Nine (with John Billingsley and Jamie McShane), Without a Trace (starring Enrique Murciano, with Rosalind Chao), and Cold Case (with Michael Shamus Wiles, Melinda Page Hamilton, and Brigid Brannagh). He has also appeared on all of the first three CSI series (appearing with Mike Starr and Mark Rolston in an episode of CSI: NY).