The typically hilarious antics of “ It’s Always Sunny in Philadelphia ” are no less hilarious in the latest season finale.

But the episode sounds a mournful note, too.

Lynne Marie Stewart , who for 20 years played Bonnie Kelly , Charlie Kelly’s (Charlie Day) mother on the show, makes an appearance in the episode, filmed before her February death at 78.

The “Golden Bachelor”-themed finale of season 17 sees Danny DeVito ’s Frank Reynolds pick a potential mate.

In the episode, titled “ The Golden Bachelor Live ,” which is dedicated to Stewart, the eternally cheerful, sweet Bonnie is brought in as a last-minute “wildcard” addition to the reality show within the episode. She’s thrown into the mix of ladies Frank has to pick from on the show, mostly because of her previous

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