 Cast and character debuts: Fred Rogers (I) (qv), Joe Negri (qv),  Betty Aberlin (qv), and David Newell (IV) (qv) (Mr. McFeely)  were all in the primary cast prior to the shows debut. Chef  Brockett first appeared in episode #8; John Reardon (II) (qv)  first appeared in episode #45; François Clemmons (qv) debuted in  episode #119; and Bob Trow (qv) debuted in episode #129 as Robert  Troll, and as himself in episode #1066. Bob Dog was introduced in  1970. Yoshi Ito (qv) debuted in episode #1154, Elsie Neal (qv)  debuted in episode #1222, Maggie Stewart (I) (qv) debuted in  episode #1402, Chuck Aber (qv) debuted in episode #1480.