Logline
An accident with an experimental quantum probability field causes everyone on the USS Enterprise to break uncontrollably into song, but the real danger is that the field is expanding and beginning to impact other ships—allies and enemies alike.
Written by Dana Horgan & Bill Wolkoff
Directed by Dermott Downs
Kirk and Uhura are real ones for never telling McCoy that Spock had a phase of being proud to be human until he got dumped by Nurse Chapel. He never would have let him live it down.