Monday, January 21, 8 p.m. on WHRO Kids (WHRO 15.3, Cox 108 and Charter 194)

A string of villain break-ins at headquarters leads to a revelation about Otis's past that has the potential to change the history of Odd Squad...and the world. Otis, Olympia, Ms. O and Oona team up to try to put things right again one last time in this one-hour Odd Squad event.