Answer: timewarp

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