Leonard "Lenny" Kosnowski - Laverne & Shirley

Laverne & Shirley

Main cast, played by Michael McKean

Episode 7x01: The Most Important Day Ever (Oct 13, 1981)
Episode 7x02: It Only Hurts When I Breathe (Oct 27, 1981)
Episode 7x06: Night at the Awards (Nov 24, 1981)
Episode 7x08: Moving In (Dec 8, 1981)
Episode 7x09: Friendly Persuasion (Dec 15, 1981)
Episode 7x10: I Do, I Don't (Jan 5, 1982)
Episode 7x11: Love Is the Tar Pits (Jan 12, 1982)
Episode 7x13: Rocky Ragu (Jan 26, 1982)
Episode 7x18: Helmut Weekend (Mar 2, 1982)
Episode 7x19: That's Entertainment (Mar 9, 1982)
Episode 7x20: Lightning Man (Mar 16, 1982)
Episode 7x22: Perfidy in Blue (May 11, 1982)
Episode 8x01: The Mummy's Bride (Sep 28, 1982)
Episode 8x03: The Note (Oct 19, 1982)
Episode 8x07: Death Row (2) (Nov 23, 1982)
Episode 8x18: Please Don't Feed the Buzzards (Feb 22, 1983)

Guest cast, played by Michael McKean

Episode 1x01: The Society Party (Jan 27, 1976)
Episode 1x02: The Bachelor Party (Feb 3, 1976)
Episode 1x03: Bowling for Razzberries (Feb 10, 1976)
Episode 1x04: A Nun's Story (Feb 24, 1976)
Episode 1x05: Falter at the Altar (Mar 2, 1976)
Episode 1x06: Dog Day Blind Dates (Mar 9, 1976)
Episode 1x07: Once Upon a Rumor (Mar 16, 1976)
Episode 1x08: One Flew Over Milwaukee (Mar 23, 1976)
Episode 1x09: Dating Slump (Mar 30, 1976)
Episode 1x10: It's the Water (Apr 6, 1976)
Episode 1x11: Fakeout at the Stakeout (Apr 13, 1976)
Episode 1x12: Hi, Neighbor (Apr 27, 1976)
Episode 1x13: How Do You Say 'Are You Dead' in German? (May 4, 1976)
Episode 1x14: From Suds to Stardom (May 11, 1976)
Episode 1x15: Mother Knows Worst (May 18, 1976)
Episode 2x01: Drive! She Said (Sep 28, 1976)
Episode 2x02: Angels of Mercy (Oct 5, 1976)
Episode 2x03: Bachelor Mothers (Oct 19, 1976)
Episode 2x05: Bridal Shower (Nov 9, 1976)
Episode 2x06: Look Before You Leap (Nov 16, 1976)
Episode 2x07: Dear Future Model (Nov 23, 1976)
Episode 2x08: Good Time Girls (Nov 30, 1976)
Episode 2x09: Two of Our Weirdos Are Missing (Dec 7, 1976)
Episode 2x10: Christmas Eve at the Booby Hatch (aka Oh, Hear the Angel Voices) (Dec 21, 1976)
Episode 2x11: Guilty Until Proven Not Innocent (Jan 4, 1977)
Episode 2x12: Anniversary Show (aka Birthday Show) (Jan 10, 1977)
Episode 2x13: Playing Hooky (Jan 11, 1977)
Episode 2x14: Guinea Pigs (Jan 18, 1977)
Episode 2x15: Call Me a Taxi (Feb 1, 1977)
Episode 2x16: Steppin' Out (Feb 8, 1977)
Episode 2x17: Buddy, Can You Spare a Father? (Feb 15, 1977)
Episode 2x18: Honeymoon Hotel (Feb 22, 1977)
Episode 2x19: Hi, Neighbor Book 2 (Mar 1, 1977)
Episode 2x20: Frank's Fling (Mar 8, 1977)
Episode 2x21: Haunted House (Mar 22, 1977)
Episode 2x22: Lonely at the Middle (Mar 29, 1977)
Episode 2x23: Citizen Krane (Apr 5, 1977)
Episode 3x01: Airport '59 (Sep 20, 1977)
Episode 3x02: Tag Team Wrestling (Sep 27, 1977)
Episode 3x03: The Pact (Oct 4, 1977)
Episode 3x04: Robot Lawsuit (Oct 25, 1977)
Episode 3x05: Laverne's Arranged Marriage (Nov 1, 1977)
Episode 3x06: Cruise (1) (Nov 8, 1977)
Episode 3x07: Cruise (2) (Nov 15, 1977)
Episode 3x08: Laverne and Shirley Meet Fabian (Nov 22, 1977)
Episode 3x09: The Stakeout (Nov 29, 1977)
Episode 3x10: Shirley's Operation (Dec 6, 1977)
Episode 3x11: Take My Plants, Please (Dec 13, 1977)
Episode 3x12: New Years Eve 1959 (Dec 27, 1977)
Episode 3x13: The Mortician (Jan 10, 1978)
Episode 3x14: The Horse Show (Jan 17, 1978)
Episode 3x15: The Slow Child (Jan 24, 1978)
Episode 3x16: The Second Almost Annual Shotz Talent Show (Jan 31, 1978)
Episode 3x17: The Dentist (Feb 7, 1978)
Episode 3x18: Bus Stop (Feb 14, 1978)
Episode 3x19: The Driving Test (Feb 21, 1978)
Episode 3x20: The Obstacle Course (Feb 28, 1978)
Episode 3x21: The Debutante Ball (May 9, 1978)
Episode 3x22: 2001: A Comedy Odyssey (May 16, 1978)
Episode 3x23: The Dance Studio (May 23, 1978)
Episode 3x24: Breaking Up and Making Up (May 30, 1978)
Episode 4x01: Festival (1) (Sep 5, 1978)
Episode 4x02: Festival (2) (Sep 5, 1978)
Episode 4x03: Playing the Roxy (Sep 19, 1978)
Episode 4x04: The Robbery (Sep 26, 1978)
Episode 4x05: The Quiz Show (Oct 10, 1978)
Episode 4x07: Date with Eraserhead (Oct 24, 1978)
Episode 4x08: The Bully Show (Oct 31, 1978)
Episode 4x09: A Visit to the Cemetery (Nov 14, 1978)
Episode 4x10: Chorus Line (Nov 21, 1978)
Episode 4x11: Laverne and Shirley Move In (Nov 28, 1978)
Episode 4x12: Dinner For Four (Dec 5, 1978)
Episode 4x13: It's a Dog's Life (Dec 12, 1978)
Episode 4x14: O, Come All Ye Bums (Dec 19, 1978)
Episode 4x15: Who's Papa? (Jan 16, 1979)
Episode 4x16: The Third Annual Shotz Talent Show (Jan 30, 1979)
Episode 4x17: Supermarket Sweep (Feb 6, 1979)
Episode 4x18: Lenny's Crush (Feb 13, 1979)
Episode 4x19: Fire Show (Feb 20, 1979)
Episode 4x20: Squiggy in Love (Feb 27, 1979)
Episode 4x21: The Feminine Mistake (Mar 6, 1979)
Episode 4x22: The Tenants Are Revolting (Mar 13, 1979)
Episode 4x23: There's a Spy in My Beer (May 8, 1979)
Episode 4x24: Shirley and the Older Man (May 15, 1979)
Episode 5x01: Shotgun Wedding (2) (Sep 13, 1979)
Episode 5x02: One Heckuva Note (Sep 20, 1979)
Episode 5x03: Fat City Holiday (Sep 27, 1979)
Episode 5x04: Upstairs, Downstairs (Oct 4, 1979)
Episode 5x05: What Do You Do with a Drunken Sailor? (Oct 18, 1979)
Episode 5x06: You've Pushed Me Too Far (Oct 25, 1979)
Episode 5x07: The Wedding (Nov 1, 1979)
Episode 5x08: Bad Girls (Nov 8, 1979)
Episode 5x09: We're in the Army Now (1) (Nov 15, 1979)
Episode 5x10: We're in the Army Now (2) (Nov 15, 1979)
Episode 5x11: Take Two, They're Small (Nov 22, 1979)
Episode 5x12: The Fourth Annual Shotz Talent Show (Dec 6, 1979)
Episode 5x13: Testing, Testing (Dec 13, 1979)
Episode 5x14: Not Quite South of the Border (Jan 7, 1980)
Episode 5x15: You Oughta Be in Pictures (Jan 14, 1980)
Episode 5x16: The Beatnik Show (Jan 21, 1980)
Episode 5x17: The Right to Light (Jan 28, 1980)
Episode 5x18: Why Did the Fireman...? (Feb 4, 1980)
Episode 5x19: The Collector (Feb 11, 1980)
Episode 5x20: Murder on the Moosejaw Express (1) (Feb 26, 1980)
Episode 5x21: Murder on the Moosejaw Express (2) (Mar 4, 1980)
Episode 5x22: Survival Test (Mar 11, 1980)
Episode 5x23: The Duke of Squigman (Mar 25, 1980)
Episode 5x24: Antonio, the Amazing (Apr 1, 1980)
Episode 5x25: The Diner (May 6, 1980)
Episode 5x26: Separate Tables (May 13, 1980)
Episode 6x01: Not Quite New York (Nov 18, 1980)
Episode 6x02: Welcome to Burbank (Nov 25, 1980)
Episode 6x03: Studio City (Dec 2, 1980)
Episode 6x04: Grand Opening (Dec 9, 1980)
Episode 6x05: Candy Is Dandy (Dec 16, 1980)
Episode 6x06: The Dating Game (Dec 30, 1980)
Episode 6x07: The Other Woman (Jan 6, 1981)
Episode 6x08: The Road to Burbank (Jan 13, 1981)
Episode 6x09: Born Too Late (Jan 27, 1981)
Episode 6x10: Love Out the Window (Feb 3, 1981)
Episode 6x11: Malibu Mansion (Feb 10, 1981)
Episode 6x12: To Tell the Truth (Feb 17, 1981)
Episode 6x13: I Do, I Do (Feb 24, 1981)
Episode 6x14: But Seriously, Folks . . . (Mar 3, 1981)
Episode 6x15: The Bardwell Caper (1) (Mar 10, 1981)
Episode 6x16: The Bardwell Caper (2) (Mar 17, 1981)
Episode 6x17: High Priced Dates (Apr 7, 1981)
Episode 6x18: Fifth Anniversary (Apr 14, 1981)
Episode 6x19: Out, Out Damned Plout (May 5, 1981)
Episode 6x20: Laverne's Broken Leg (May 12, 1981)
Episode 6x21: Sing, Sing, Sing (May 19, 1981)
Episode 6x22: Child's Play (May 26, 1981)