Template: RefTNG123
From Trekipedia
Roddenberry, Gene (Executive Producer). "Symbiosis". Star Trek: The Next Generation, season 1, episode 22 (Production number 123). Co-Executive Producers: Rick Berman & Maurice Hurley. Directed by Win Phelps. Story by Robert Lewin. Teleplay by Robert Lewin & Richard Manning & Hans Beimler. Paramount Pictures. 18 April 1988.