The Flash - Season 3, Episode 18: Soundtracks

Barry and Iris have a coffee date with Cecilia and Joe at CC Jitters; Cecelia compliments the ring then asks for story behind Barry proposing to Iris; Barry outs Joe as being able to sing to Cecelia when she learns that Barry sung to Iris as he proposed; Cecelia asks Barry and Iris to go on another couples date to Hamilton though when she mentions the date being the end of July its make for an awkward situtation.