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Guy Siner
★ Acting

Guy Siner

Born 1947 · New York City, New York, USA · Active 1963–2026

Guy Siner, an actor known for his work in cult cinema, appears in Leprechaun 4: In Space (1996) as a character navigating the absurdities of intergalactic mischief. With a career steeped in the eccentricities of genre films, Siner's contribution to this outrageous installment of the Leprechaun series adds a distinctive layer to its campy narrative. His performance encapsulates the playful spirit of the 1990s horror-comedy blend, making him a fitting presence in the SassyFlix catalog.

▶ Watch on SassyFlix 1 film available
Leprechaun 4: In Space

Leprechaun 4: In Space

1996 ★ 3.5
as Dr. Mittenhand

n 2096, on a remote planet, the Leprechaun courts a princess named Zarina, in a nefarious plot to become king of her home planet. The two agree to marry, with each partner planning to kill the other after the wedding night in order to enjoy the marriage benefits (a peerage for the Leprechaun, the Leprechaun's gold and jewels for the princess) undisturbed. A platoon of space marines arrive on the planet and kill the Leprechaun for interfering with mining operations. Lucky tries to steal gold but gets killed by the leprechaun with a lightsaber. A grenade explodes and kills the leprechaun. Gloating over the victory, one of the marines, Kowalski, urinates on the Leprechaun's body. Unbeknownst to Kowalski, the Leprechaun's spirit travels up his urine stream and into his penis, where his presence manifests as gonorrhea. The marines return to their ship with the injured Zarina, whom they plan to return to her homeworld in order to establish positive diplomatic relations. The ship's commander, the cyborg Dr. Mittenhand, explains his plans to use Zarina's regenerative DNA to recreate his own body, which was mutilated in a failed experiment. Elsewhere on the ship, the Leprechaun violently emerges from Kowalski's penis after he is aroused during a sexual act. The marines hunt the Leprechaun, who outsmarts them and kills most of the crew in gruesome and absurd ways. While pursuing Zarina, the Leprechaun injects Mittenhand with a mixture of Zarina's DNA and the remains of a blended scorpion and tarantula, before initiating the ship's self-destruct mechanism. A surviving marine, Sticks, rushes to the bridge to defuse the self-destruct but is stopped by a password prompt. Mittenhand—now a grotesque monster calling himself "Mittenspider"—entangles Sticks in a giant web. Meanwhile, the other survivors confront the Leprechaun in the cargo bay, where they inadvertently cause him to transform into a giant after shooting him with Dr. Mittenhand's experimental growth ray. The ship's biological officer, Tina Reeves, escapes to the bridge and rescues Sticks by spraying Mittenhand with liquid nitrogen and shooting him. The only other surviving marine, Books, opens the airlock so the giant Leprechaun is sucked into space and explodes. Books joins the others at the helm and they deduce that the password is "Wizard", since Dr. Mittenhand previously compared himself to the Wizard of Oz. After stopping the self-destruct sequence, Books and Reeves kiss, while Sticks looks out the window to see the Leprechaun's giant hand giving him the finger.  Resurfacing on an alien planet, the Leprechaun abducts a member of the world's royalty, Princess Zarina, who is impressed with his gold and desires to separate him from it. Unfortunately for the diminutive schemer, well-armed soldiers arrive to foil his plans.

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Career Highlights Top 6 by popularity · TMDB

Filmography

38 credits
2020s 6 credits
2026
TV ★ 6.3
2024
Misty as Walter Domville
Movie
2024
Rivals as Bishop Hubert Brenton
TV ★ 7.4
2022
Movie ★ 4.0
2021
The Right Bus as Sir Joycelyn Napier
Movie
2020
The Loss Adjuster as Dr. Norman Wicksteed
Movie ★ 5.8
2010s 3 credits
2016
The Crown as Francis Pym
TV ★ 8.2
2013
Family Tree as Mitch Connelly
TV ★ 6.4
2011
Ironclad as Oaks
Movie ★ 6.1
2000s 11 credits
2007
Movie ★ 6.9
2007
Movie ★ 5.0
2007
Movie ★ 8.2
2004
Vlad as Ilie
Movie ★ 4.1
2002
Bug as Maitre D'
Movie ★ 7.3
2001
Megiddo: The Omega Code 2 as British Leader
Movie ★ 4.6
2001
That's My Bush! as Dr. Thomas Klestil
TV ★ 6.7
2001
TV ★ 7.5
2001
The Agency as Dr. Piet Halpern
TV ★ 6.7
2000
Movie ★ 5.8
1990s 9 credits
1998
Martial Law as Dr. Dreece
TV ★ 7.1
1997
Lost Highway as Prison Official #1
Movie ★ 7.5
1997
Movie ★ 3.7
1997
Leprechaun 4: In Space as Dr. Mittenhand
Movie ★ 4.6
1994
Babylon 5 as Religious Minbari
TV ★ 8.0
1993
Diagnosis: Murder as Auctioneer
TV ★ 7.1
1991
The Brittas Empire as Philip Silverman
TV ★ 6.6
1991
TV ★ 7.4
1990
You Rang, M'Lord? as Noël Coward
TV ★ 7.3
1980s 3 credits
1989
Seinfeld as Mr Mandel
TV ★ 8.3
1987
TV ★ 6.3
1984
'Allo 'Allo! as Lieutenant Hubert Gruber
TV ★ 7.8
1970s 4 credits
1979
TV ★ 5.3
1977
Secret Army as German Monitoring Personnel
TV ★ 7.7
1976
I, Claudius as Pylades
TV ★ 7.9
1975
Movie ★ 8.8
1960s 1 credit
1963
Doctor Who as Ravon
TV ★ 7.9
Crew Credits
2020s 1 credit
2024
Misty Producer
Movie