Frequency Crossovers
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Cold Case Memories by Angeladex
Frequency (2000) and The Lady in White (1988) Crossover. John Sullivan gets a lead on a cold case when Naval divers find the remains of what they think might be one of the victims of the Cliffside Killer from the late 50s. He manages to get an interview with one of the Killer's victims; one Franklin T. Scarlatti. Sometimes things like this...stay with you. Even 40 years later.
Crossover - Misc. Movies & Frequency - Rated: T - English - Crime/Drama - Chapters: 1 - Words: 1,617 - Published: 11/30/2019 - Frank S., John S. - Complete
Hope lies in a shallow grave by ElnaKernor
John Sullivan was just promoted to Homicide detective, and it's time for him to go after the serial killer who took his mother's life. It's the first reason he joined the NYPD, after all. Frank Sullivan knew something was going to go down, he just didn't know what exactly. He mostly hoped it wouldn't be his brother's life.
Crossover - Frequency & Frequency - Rated: T - English - Mystery/Crime - Chapters: 1 - Words: 3,161 - Published: 6/23/2017 - John S., Frank S., Satch R.
Christmases Past by RPGgirl514 reviews
Detective John Sullivan gets the call for a four A.M. body drop and nearly runs over a drunk girl. Instead he finds a kindred spirit in Kate Beckett.
Crossover - Castle & Frequency - Rated: K+ - English - Angst/Crime - Chapters: 1 - Words: 3,819 - Reviews: 2 - Favs: 2 - Follows: 1 - Published: 9/27/2015 - Kate B., Johanna B., John S., Satch D. - Complete
Not a Regular Day by TesubCalle reviews
New Chapter! Original concept from an NFA Community movie challenge. Things are getting more serious, and more cracked, as now Tim and Abby are drawn into the mix... 'NCIS' and 'Frequency' crossover. Non slash.
Crossover - NCIS & Frequency - Rated: K+ - English - Humor/Sci-Fi - Chapters: 5 - Words: 15,043 - Reviews: 6 - Favs: 1 - Follows: 9 - Updated: 4/1/2009 - Published: 6/22/2008 - Tony D., John S.