Future CSI co-star Marg Helgenberger makes a guest appearance in this Valentine's Day episode, in which Frasier (Kelsey Grammer) finally wears down his dad Martin's resistance and gets the older man to accompany him to the opera. Actually, this invitation is but a smokescreen, so that Frasier can "accidentally" run into his newest dream girl Emily (Marg Helgenberger). Uncomfortable to begin with, Martin is aghast when Emily's mother (Mary Louise Wilson) expresses an interest in him. To keep mom at arm's length, Martin drops a few hints suggesting that he is gay -- with catastrophic results for Martin's other son Niles (David Hyde Pierce). ~ Hal Erickson, Rovi