The Two Missionaries

1974 · Writer

Seagull Island

1982 · Writer

Come stanno bene insieme

1989 · Writer

The Tough and the Mighty

1969 · Writer

Long Days of Vengeance

1967 · Writer

Pecos Cleans Up

1967 · Writer

Halleluja for Django

1967 · Writer

Nosferatu in Venice

1988 · Director, Writer

The Great Kidnapping

1973 · Writer

Hotel Laguna

2001 · Writer

Life Is Beautiful

1979 · Writer

The Witness

1978 · Writer

Poker with Pistols

1967 · Writer

The Secret of Seagull Island

1982 · Writer

The Precarious Bank Teller

1980 · Writer

Death Rides Along

1967 · Writer

Brothers Blue

1973 · Writer

All for the Moral Majority!

1984 · Writer

L'anello matrimoniale

1979 · Writer

Grand Slam

1967 · Writer

Forever

1991 · Writer

The Designated Victim

1971 · Writer

The Last Killer

1967 · Writer

L'altra metà del cielo

1977 · Writer

White Hunter

1990 · Director, Writer

Società a responsabilità molto limitata

1973 · Writer

The Cat

1977 · Writer

Five Days in Sinai

1968 · Writer

You Only Die Once

1967 · Writer

Si fa presto a dire amore

2000 · Writer

Our Men in Bagdad

1966 · Writer

The Vatican Affair

1968 · Writer

Riavanti… Marsch!

1979 · Writer

Seduction Squad

1972 · Writer

Soldati e capelloni

1967 · Writer

Rock 'n Roll

1978 · Writer

Increase and Multiply

1973 · Writer

Avenger X

1967 · Writer

Via del Corso

2000 · Writer

Neapolitan Story

1983 · Writer