Assignment: Underwater (Season 1)

The Hot Chihuaha (Episode 1)

Air date: 1960-09-09

Operation Betrayal (Episode 2)

Air date: 1960-09-16

The Sea Cave (Episode 3)

Air date: 1960-09-23

Panic Off Punta Banda (Episode 4)

Air date: 1960-09-30

The Gun (Episode 5)

Air date: 1960-10-07

The Coast Watcher (Episode 6)

Air date: 1960-10-14

Charley Noble's Pearl (Episode 7)

Writer: Tom Gries

Air date: 1960-10-21

Dead-Log Pickup (Episode 8)

Air date: 1960-10-28

Decoy (Episode 9)

Air date: 1960-11-04

A Matter of Honor (Episode 10)

Writer: Malvin Wald

Air date: 1960-11-11

The Portrait (Episode 11)

Air date: 1960-11-18

A Message to Mulligan (Episode 12)

Air date: 1960-11-25

Troubled Waters (Episode 13)

Air date: 1960-12-02

Tension Below (Episode 14)

Air date: 1960-12-09

A Drop in the Ocean (Episode 15)

Air date: 1960-12-16

The Medal (Episode 16)

Air date: 1960-12-23

Odd Man Dies (Episode 17)

Air date: 1960-12-30

Nightmare Bay (Episode 18)

Air date: 1961-01-06

Affair in Tokyo (Episode 19)

Writer: Richard H. Landau

Air date: 1961-01-13

The Key (Episode 20)

Air date: 1961-01-20

The Dam (Episode 21)

Air date: 1961-01-27

Boat Missing (Episode 22)

Air date: 1961-02-03

Journey to Death (Episode 23)

Air date: 1961-02-17

The Target (Episode 24)

Air date: 1961-02-24

Dead Weight (Episode 25)

Air date: 1961-03-03

Ghost Dive (Episode 26)

Air date: 1961-03-10

Swamp Light (Episode 27)

Air date: 1961-03-17

Ship Killer (Episode 28)

Air date: 1961-03-24

Gold Feaver (Episode 29)

Air date: 1961-03-31

A Question of Degree (Episode 30)

Air date: 1961-04-07

Witness from the Dead (Episode 31)

Air date: 1961-04-14

Anchor Man (Episode 32)

Air date: 1961-04-21

The Secret of the Reef (Episode 33)

Air date: 1961-04-28

Rescue at Diamond Shoal (Episode 34)

Air date: 1961-05-05

Ordeal at Forty Fathoms (Episode 35)

Air date: 1961-05-12

No Escape (Episode 36)

Air date: 1961-05-19

Partners in Death (Episode 37)

Air date: 1961-05-26

The Deadly Game (Episode 38)

Air date: 1961-06-02