Molière’s 1673 classic, “The Imaginary Invalid,” gets a freshening up from PlayMakers Repertory Company Saturday with a new translation by David Ball (a former director of Duke’s Drama program) and a rethinking from visionary director, Dominique Serrand. This tale of doctors treating (and bilking) a hypochondriac has relevance to today’s health care issues. Paul Green Theatre, UNC. 7:30 p.m. Saturday; 2 p.m. Sunday (through Nov. 11). $15-$50. 919-962-7529; playmakersrep.org.