(written from a Production point of view)
In addition to this, Denis has appeared on such television shows as The Golden Girls, Newhart, and Perfect Strangers. A 1989 episode of Growing Pains had him playing a director on a television show on which a crewmember played by Carlos LaCamara worked. That same year, Denis appeared in two episodes of Just the Ten of Us, including one episode with Bill Erwin. In 1990, Denis guest-starred in an episode of the short-lived Gabriel's Fire, starring Madge Sinclair and also guest-starring Jack Kehler.
Outside of his work on episodic television, Denis had a role in the 1990 TV movie Daughter of the Streets, starring Harris Yulin. His only feature film credit – and his last known acting credit to date – is the 1995 crime drama Things to Do in Denver When You're Dead. Among his co-stars in this film are fellow Star Trek alumni Bill Bolender, Bill Cobbs, Bill Erwin, Willie Garson, Tommy "Tiny" Lister, Jr., Christopher Lloyd, Don Stark, and Deborah Strang.