"The Mystery Cruise" centers around best friends and impending business partners, Alvirah Meehan (Gail O'Grady), a lottery winner turned amateur sleuth, and Regan Reilly (Michelle Harrison), a private investigator. After rescuing the diamond-collared pooch of a wealthy … Gail O'Grady, Michelle Harrison, Venus Terzo, Chris Humphreys, Peter Benson, Kurt Evans, Kirsten Robek Added on Amazon Prime 2021-03-03.