PRESS PHOTO BY ED COURRIERJon Provost, who portrayed “Lassie's” companion “Timmy” in the iconic collie's TV series, speaks about his experiences at History Expo 2016, hosted by the Lehigh Valley Heritage Museum April 9. Timmy Martin is a fictional character portrayed by child actor Jon Provost in the long-running television series “Lassie” (1954 to 1973). Provost debuted in the first episode of Copyright - &Copy; Ed Courrier