His film appearances include Ghostbusters (1984), Pink Cadillac (1989), Thelma & Louise (1991), and Beverly Hills Cop III (1994).

Throughout the 1980s, Carhart made guest appearances on several television series, including Alfred Hitchcock Presents, Miami Vice and Crime Story.

Carhart has also made guest appearances on shows such as The Practice, UPN's The Twilight Zone, Frasier, Judging Amy, Standoff and a 2007 episode of Law & Order: Criminal Intent entitled "Silencer".

In 1985, Carhart had a supporting role in the Academy Award-winning drama Witness and the popular romantic comedy film Desperately Seeking Susan.

In 1987, Carhart starred in a stage production of Don DeLillo's play The Day Room at the New York City Center.

[2] On Broadway, Carhart played Harold "Mitch" Mitchell in the 1992 revival of Tennessee Williams' A Streetcar Named Desire.