During the 1980s, Harkins continued with roles in television and films appearing as a cynical lawyer in the 1981 thriller Absence of Malice, starring Paul Newman, an ill-fated real-estate agent in the 1983 horror film Amityville 3-D,1983 in The Return Of The Man From U.N.C.L.E[The Fifteen Years Later Affair] and former Communist and Cold War-era figure Whittaker Chambers in the 1984 PBS mini-series, Concealed Enemies.[2] From 1985 to 1987, he portrayed Bruce Mansfield, a recurring character on Cagney & Lacey (he later reprised the role in the 1994 television reunion movie Cagney & Lacey: The Return). In 1988, Harkins co-starred in the television adaptation of Inherit the Wind starring Jason Robards and Kirk Douglas, followed by a role in Slaves of New York. One of Harkins' last onscreen appearances was in the 1996 HBO film Crime of the Century.