West Hollywood talent agent Nathan Adler recalls how he first met 80's rocker Brad King, personal trainer Al "Muscles" Carter & actor Ross Stein as he begrudgingly prepares for his 50th birthday party.

After a run-in with a professional rival, not even gifts, cocktails and the boys' valiant efforts can cheer up Nathan on his 50th birthday; Ross receives professional bad news; Brad regales the boys with stories of his sexual conquests of the past 24 hours.

An encounter with a long-forgotten one-night-stand has Nathan feeling his age; Muscles meets a potential Mr. Right; Ross' cheerful façade cracks.

Living vicariously though his friends' adventures leaves Nathan feeling empty; Ross confesses his recent marital woes; Brad's latest conquest bruises his self-esteem; Muscles has too much in common with Bobby.

Brad gets revenge on his latest hook-up; Ross receives some provocative marriage advice; Muscles tries to get Bobby to discuss their dilemma; a cryptic session with his shrink leads Nathan to a mind-blowing encounter.

Two months have passed and it's Halloween in West Hollywood. Brad's vow of celibacy leads to a "message from God;" Muscles learns why Bobby went cold; Ross & Neal have a scary encounter; and Nathan convinces the boys to go undercover to help him stalk Damian. (Originally aired between seasons 2 and 3.)

Ross confers with a divorce lawyer; Muscles is attracted to a gym patron; Brad's accountant delivers bad news; still reeling from Damian's disappearance, Nathan has a life-changing accident.

Ross receives good news for a change; Muscles asks Brad for dating advice; Nathan gets a bizarre proposition from Nelson, then spends an evening with Jake; Brad parts with a piece of his past.

Nathan is haunted by his past as the gang gathers for Thanksgiving; Lydia introduces her new boyfriend; an unwelcome guest interrupts dinner; Brad attempts a new career path.

Brad begins a humiliating job search; Ross is cornered by his new leading lady Tanya Dickson; Muscles & Lucas get past third base; Nathan and Jake grow closer.

At Jake's urging, Nathan quits smoking; Brad tries retail but old habits die hard; Muscles questions Lucas with his new suspicions; Ross receives an unsettling welcome home; tensions rise between Lydia and Barbara.

Nathan calls in PR specialist Dan Karmel when Ross' sex tape goes viral; Brad makes another attempt at gainful employment; Muscles meets Lucas' boyfriend; Lydia and Barbara have it out.

On Christmas Eve, disillusioned Muscles heads home to Ohio; Damian's holiday card and no reply from Jake sends Nathan spiraling with indecision; Brad hits rock bottom; Ross, now a tabloid sensation, succumbs to Dan's advances.

Muscles confides in his mom in Ohio; tough love from a counselor leads Nathan to "man up" to Jake before butting heads with Nelson; Ross is forced to make a choice; Brad receives a last-minute rescue.

The Old Dogs & New Tricks celebrate the Supreme Court marriage-equality ruling. On the morning of Friday, June 26, 2015, the boys are surprised by President Obama's announcement of the ruling – but the surprises are just beginning!