Films Sikking's first film was in
Roger Corman's
Five Guns West (1955) as a Union Sergeant
uncredited. He was in
The Strangler (1964),
The Carpetbaggers (1964), ''
Von Ryan's Express (1965), In Like Flint (1967), Point Blank (1967), the Elvis Presley film Charro! (1969), Brother on the Run (1973), Capricorn One (1978), and The Electric Horseman (1979). In the 1980s, he was in The Star Chamber (1983), Up the Creek (1984), Star Trek III: The Search for Spock (1984), and Soul Man'' (1986). In the 1990s, Sikking was in the remake
Narrow Margin (1990) of 1956's
The Narrow Margin,
Final Approach (1991),
The Pelican Brief (1993), and
Whisper of the Heart (1995). In the 2000s he was in
Made of Honor (2008).
Television In the 1960s, Sikking was in a number of television series such as
Assignment: Underwater,
Rich Man, Poor Man Book II (1976)
miniseries, and portrayed Geoffrey St. James on the
NBC comedy series
Turnabout. Sikking appeared as Lieutenant (later demoted to Sergeant) Howard Hunter on the TV series
Hill Street Blues from 1981 to 1987. In 1989,
Hill Street Blues' creator,
Steven Bochco, cast Sikking in the
ABC television series
Doogie Howser, M.D. as Dr. David Howser, father of the title character. On the 1997 drama series
Brooklyn South he portrayed Captain Stan Jonas, for which he won a
People's Choice Award in 1998. Sikking was in quite a few
made-for-TV movies such as
Inside O.U.T. (1971),
The Alpha Caper (1973),
Calling Doctor Storm, M. D. (1977),
Bay Cove (1987), ''
Ollie Hopnoodle's Haven of Bliss (1988), and Doing Time on Maple Drive'' (1992). == Personal life and death ==