It began with Guns of the Magnificent Seven as a character named Cassie
He starred with David Carridine and Barbara Hershey in Box Car Bertha in 1972
Another noteworthy role was in 1972's Gargoyles (TV Movie) as "The Gargoyle"
He also starred with Jim Brown in Black Gunn as Seth
He starred as Reuben in Cleopatra Jones
He starred as
Mauice Stokes in 1973's Maurie:
In 1976 he starred in Dr. Black, Mr. Hyde as Dr. Henry Pride
The Man Who Fell to Earth (1976) was his next project and it included a nude scene:
Ring of Passion, Casey played Joe Louis
A TV series Harris and Company Mike Harris
in 1979 was
The Martian Chronicles (TV Mini-Series) as Major Jeff Spender aired in 1980
In 1981 he was Burt Reynold's partner "Arch" in Sharky's Machine
The Fantastic World of D.C. Collins (TV Movie) as J.T. Collins in 1984, and he co-starred with Fred Dryer.
Also in 1984 he was U.N. Jefferson in Revenge of the Nerds
In a spoof
Black Exploitation films he played John Slade in I'm on Get You Sucka Gonna
1989 brought his role as Mr. Ryan in Bill & Ted's Excellent Adventure
In 1994 he played Commander Calvin Hudson in Star Trek: Deep Space Nine (TV Series)
The Glass Shield in 1994. Bernie Casey starred with Ice Cube.