Cast Credits Beverly Hills, 90210 (1990) Guest starring as Keith Christopher (9 episodes) Episode 4x32: Mr. Walsh Goes to Washington (2) (May 25, 1994) Episode 4x31: Mr. Walsh Goes to Washington (1) (May 25, 1994) Episode 4x26: Blind Spot (Apr 6, 1994) Episode 4x16: Crunch Time (Jan 5, 1994) Episode 4x14: Windstruck (Dec 15, 1993) Episode 4x13: Emily (Dec 1, 1993) Episode 4x12: Radar Love (Nov 24, 1993) Episode 4x11: Take Back the Night (Nov 17, 1993) [Co-Star] Episode 4x09: Otherwise Engaged (Nov 3, 1993) [Co-Star] View 6 more View 6 less