Robert Young ..... Dr Marcus Welby (1969-1976)
James Brolin ..... Dr Steven Kiley (1969-1976)
Elena Verdugo ..... Consuelo Lopez (1969-1976)
Sharon Gless ..... Kathleen Faverty (1974-1976)
Pamela Hensley ..... Janet Blake (1975-1976)
Anne Schedeen ..... Sandy Porter (1975-1976)
Gavin Brendan ..... Phil Porter (1975-1976)