Answer: timewarp

AnswerCrossword Clue
TIMEWARP

"Rocky Horror..." dance

TIMEWARP

Hypothetical portal

TIMEWARP

Sci-fi passage

TIMEWARP
Fictional portal
TIMEWARP
Fictional travel aid
TIMEWARPDance done in "The Rocky Horror Picture Show"
TIMEWARPTheoretical space-travel anomaly
TIMEWARPSci-fi phenomenon that could change history
TIMEWARPSci-fi travel medium
TIMEWARPSci-fi subject, or a 1970's dance
TIMEWARPPlot device in some science fiction
TIMEWARP"In one era and out the other" phenomenon?
TIMEWARPDance in "The Rocky Horror Picture Show"
TIMEWARPDance in which "you bring your knees in tight"
TIMEWARP"Rocky Horror Picture Show" dance
TIMEWARPScience fiction device
TIMEWARPWhere the past comes alive?
TIMEWARP"Star Trek" anomaly