The Simpsons Spin-Off Showcase unoriginal, poor television writing and references and parodies many television series. When Troy McClure mentions that Fox can only fill up three slots for the next season, the three series are "Melrose Place", "The X-Files" and "The Simpsons" itself. In the museum of television, Troy walks by posters of spin-offs, such as "The Ropers" (spun off from "Three's Company"), "Laverne & Shirley" (spun off from "Happy Days"), "Rhoda", a show that Julie Kavner, the voice of Marge, once starred in, (spun off from "The Mary Tyler Moore Show") and "Fish" (spun off from "Barney Miller"), to demonstrate the power of
T. P. McKenna Adamant Lives!" (1967), "Jason King" (1972), "The Sweeney" (1975), "Blake's 7" (1978), "Minder" (1984) and in the "Doctor Who" serial "The Greatest Show in the Galaxy" (1989). He played Richmond in the Thames Television series "Callan" (1972) and made ten appearances in "Crown Court" (1974–1982), mainly as barrister Patrick Canty, while also appearing in the popular ATV anthology drama series "Love Story" (1965-1968). He also featured prominently in other television dramas including "The Duchess of Malfi" (1972), "Napoleon and Love" (1974),"The Changeling" (1974), "Fathers and Families (1977)", "Holocaust" (1978), "The Manions of America" (1981), "To the Lighthouse" (1983), "The Scarlet