Star Trek: Voyager (1995–2001)
5 user 4 critic

Heroes And Demons 

When Harry disappears during his Beowulf holonovel, Chakotay and Tuvok, sent to investigate, disappear as well. Not wanting to lose anymore crewmembers, the Doctor's transferred to the holodeck to investigate.


Les Landau


Gene Roddenberry (based upon "Star Trek" created by), Rick Berman (created by) | 4 more credits »




Episode complete credited cast:
Kate Mulgrew ... Capt. Kathryn Janeway
Robert Beltran ... Cmdr. Chakotay
Roxann Dawson ... Lt. B'Elanna Torres (as Roxann Biggs-Dawson)
Jennifer Lien ... Kes
Robert Duncan McNeill ... Lt. Tom Paris
Ethan Phillips ... Neelix (credit only)
Robert Picardo ... The Doctor
Tim Russ ... Lt. Tuvok
Garrett Wang ... Ensign Harry Kim
Marjorie Monaghan ... Freya
Christopher Neame ... Unferth
Michael Keenan ... Hrothgar
Majel Barrett ... Voyager Computer (voice)


Beaming over samples from a protostar contaminates Voyager with photonic energy, adversely affecting the holodeck where Ensign Kim runs his Beowulf holonovel. Kim disappears, and when Tuvok and Chakotay investigate, they disappear, too. Janeway turns to the photonic Doctor as the only crewman who can deal with this problem without harm, thus giving the Doctor his first experiences outside of sick bay, with duties beyond medical. Written by statmanjeff

Plot Summary | Add Synopsis


TV-PG | See all certifications »

Did You Know?


Janeway's new hairstyle was actress Kate Mulgrew's actual hair. It was dropped after two episodes as it was difficult to keep in place. See more »


When the doctor walks with Freya in the forest, she shows him a powerful plant. The doctor, who has encyclopedic knowledge, identifies the plant as a fungus called Amanita Muscaria and says it is poisonous. If the writers had chosen any other mushroom, this would be an obscure goof noticed only by mycologists or other mycophiles, but the Amanita Muscaria is the most readily and broadly identified mushroom in the world - the big red one with the white dots. What is shown is a handful of white flimsy mushrooms, perhaps the edible oyster mushrooms or white chantrelles. See more »


The Doctor: You might want to put some ice on that. It'll take down the swelling.
See more »


Star Trek: Voyager - Main Title
Written by Jerry Goldsmith
Performed by Jay Chattaway
See more »

User Reviews

A lot of good, a lot of bad.
5 February 2015 | by MartinHaferSee all my reviews

"Heroes and Demons" is the sort of Star Trek story that I generally hate--a holodeck tale. Too often in the various Trek shows this gimmick was overused--as if the writers had run out of ideas so they placed the crew in the old west, the time of Robin Hood or in a Sherlock Holmes story. I realize some people liked these sort of shows but they so often had little to do with the series and seemed like filler. In this case, however, there still is a bit to like...even if it is set within the story "Beowulf"--and as a student, I HATED "Beowulf"!

When the show begins, Torres and the Captain are performing an experiment. Little do they realize that they are NOT dealing with some inert space material but a living being. The entity takes up residence in the holodeck and that is a problem because it then attacks folks who try to battle Grendel--as Grendel is this entity. So, because it is harmful to people, the Doctor is given his chance to go one a mission into the program and try to rescue three lost crew members.

It's nice seeing more of the Doctor. He's definitely my favorite of the crew and seeing him come into his own in this story is a lot of fun. Enjoyable but overall a mixed bag.

10 of 18 people found this review helpful.  Was this review helpful to you? | Report this
Review this title | See all 5 user reviews »

Frequently Asked Questions

This FAQ is empty. Add the first question.


Official Sites:

Official Site




Greek | English

Release Date:

24 April 1995 (USA) See more »

Company Credits

Show more on IMDbPro »

Technical Specs


Sound Mix:

Dolby | Stereo



Aspect Ratio:

1.33 : 1
See full technical specs »

Contribute to This Page

Recently Viewed