Cellbound is a 1955 cartoon short featuring Spike and directed by Tex Avery and Michael Lah.
This cartoon and Deputy Droopy were the last two directed by Tex Avery for MGM, before he left to return to Walter Lantz Productions in 1953, where his career in animation began.
However, he has come up with an escape plan and starts digging a tunnel under his cell floor using a teaspoon, only temporarily stopping whenever a guard or the warden walks by.
Spike realizes he must play out everything the warden wants to watch, using his disguises and careful positioning on the TV screen to do it; first is a Western movie, followed by a boxing match.
An exhausted Spike, not wanting to go through any more, breaks through the bottom of the set and starts digging through the ground just as the warden picks the TV up and heads home with it.