FOX | 8:00 pm

Alexander Weiss, who won the first season of the "Masterchef" junior edition, makes a surprise return in the new episode "Junior Edition: Alexander in a Box," which sees the remaining young chefs challenged to demonstrate how many fish they can filet in 15 minutes. The three chefs who have the lowest tally of fish will have to create a show-stopping salmon dish and dazzle the judges to make it into the final four. Another new episode immediately follows.