(written from a Production point of view)
David Christian appeared as a Borothan pilgrim in the Star Trek: Enterprise first season episode "Cold Front" in 2001. His costume from this episode was later sold off on the It's A Wrap! sale and auction on eBay.  He filmed his scenes on Friday 5 October 2001, Wednesday 10 October 2001 and Friday 12 October 2001 on Paramount Stage 8 and 18.